Inventor · disambiguated record
Wilfried Zecher
Also filed as: CLARENZ WERNER · MERTEN RUDOLF · ZECHER WILFRIED
36 granted patents·338 citations·filing 1968–1989
97Inventor score
Files withBAYER AG36
Top patents by PatentIndex Score
36 records- 0195US4515974AProcess for the preparation of fumaric acid monoestersBAYER AG·Filed 1982·Granted May 7, 1985·45 cites·19 claims
- 0291US3939122AProcess for the preparation of compounds which contain hydantoin ringsBAYER AG·Filed 1974·Granted Feb 17, 1976·61 cites·10 claims
- 0388US4628079APolyamide imides produced from either lactams or polyamides with isocyanates or anhydrides in which products are precipitated with a non-solventBAYER AG·Filed 1985·Granted Dec 9, 1986·32 cites·10 claims
- 0478US4096291AMelt coating composition and coating processBAYER AG·Filed 1975·Granted Jun 20, 1978·27 cites·17 claims
- 0573US3966683AProcess for the preparation of compounds which contain hydantoin groupsBAYER AG·Filed 1974·Granted Jun 29, 1976·8 cites·13 claims
- 0668US4910045AProcess for improving the adhesive strength of electrolessly deposited metal layers on polyimide surfacesBAYER AG·Filed 1988·Granted Mar 20, 1990·24 cites·8 claims
- 0766US4549006APolyamideimides produced from either lactams or polyamides with isocyanates and anhydrides as thermoplastsBAYER AG·Filed 1984·Granted Oct 22, 1985·13 cites·1 claims
- 0865US4908430AUse of special polyimides as cast films and coatingsBAYER AG·Filed 1988·Granted Mar 13, 1990·13 cites·7 claims
- 0961US4088637AProcess for the production of polycondensates containing imide groupsBAYER AG·Filed 1976·Granted May 9, 1978·11 cites·14 claims
- 1057US4124568APolycondensatesBAYER AG·Filed 1977·Granted Nov 7, 1978·11 cites·12 claims
- 1155US5093457AProduction of polyamide imidesBAYER AG·Filed 1989·Granted Mar 3, 1992·9 cites·11 claims
- 1252US4293669AHeat-resistant cross-linked polymers and the use thereof as bindersBAYER AG·Filed 1980·Granted Oct 6, 1981·10 cites·5 claims
- 1349US4517353AProcess for preparation of hydantoin esters through a masked polyisocyanate-carbodiimide routeBAYER AG·Filed 1983·Granted May 14, 1985·8 cites·9 claims
- 1449US4246393AProcess for the preparation of poly(thio)hydantoinsBAYER AG·Filed 1978·Granted Jan 20, 1981·6 cites·6 claims
- 1548US4600729AProcess for the preparation of aliphatic-aromatic poly-amide-imides in the absence of phenolsBAYER AG·Filed 1985·Granted Jul 15, 1986·6 cites·2 claims
- 1647US4546162APolyamidoimides prepared from trimelitic acid anhydride, isocyanates and either lactams or polyamides using a mixture of diisocyanatodiphenylmethane and tolylene diisocyanatesBAYER AG·Filed 1984·Granted Oct 8, 1985·7 cites·9 claims
- 1745US3979421AReaction products containing free isocyanato groupsBAYER AG·Filed 1968·Granted Sep 7, 1976·4 cites·4 claims
- 1844US5004795AAliphatic-aromatic polyamide-imidesBAYER AG·Filed 1989·Granted Apr 2, 1991·5 cites·8 claims
- 1943US4624981AProcess for the production of polyamideimides from polyisocyanates, polycarboxylic acid anhydrides and lactams or polyamides in which the reaction products are precipitated with a non-solventBAYER AG·Filed 1985·Granted Nov 25, 1986·4 cites·8 claims
- 2042US4289868APolyhydantoins from unsaturated carboxylic acids and polyiso(thio)cyanatesBAYER AG·Filed 1979·Granted Sep 15, 1981·1 cites·3 claims
- 2141US4076694AProcess for the production of polycondensates containing imide groupsBAYER AG·Filed 1976·Granted Feb 28, 1978·4 cites·6 claims
- 2240US4472567AProcess for the production of polyamide imidesBAYER AG·Filed 1983·Granted Sep 18, 1984·4 cites·9 claims
- 2339US4792590AAliphatic-aromatic polyamidimides containing polyamidesBAYER AG·Filed 1987·Granted Dec 20, 1988·5 cites·19 claims
- 2439US4269750AProcess for the preparation of polymers containing hydantoin groupsBAYER AG·Filed 1979·Granted May 26, 1981·3 cites·11 claims
- 2537US4182812AProcess for the preparation of hydantoin lacquersBAYER AG·Filed 1977·Granted Jan 8, 1980·2 cites·8 claims
- 2636US4298515AProcess for the preparation of polymers containing hydantoin groupsBAYER AG·Filed 1979·Granted Nov 3, 1981·2 cites·10 claims
- 2736US4196274AProcess for the production of hydantoins and polyhydantoin resinsBAYER AG·Filed 1977·Granted Apr 1, 1980·2 cites·8 claims
- 2835US4640970AProcess for the production of polyamide imidesBAYER AG·Filed 1985·Granted Feb 3, 1987·4 cites·7 claims
- 2935US4548970APolyamideimides prepared by reacting either lactams or polyamides with polyisocyanates and anhydrides using a lactam as an additiveBAYER AG·Filed 1984·Granted Oct 22, 1985·3 cites·5 claims
- 3035US4187365AProcess for the production of polycondensate containing cyclic imide groupsBAYER AG·Filed 1978·Granted Feb 5, 1980·2 cites·2 claims
- 3134US4384122AProcess for the production of imidazolidine trionesBAYER AG·Filed 1981·Granted May 17, 1983·0 cites·5 claims
- 3233US4829140APolyamidimides having modified end groupsBAYER AG·Filed 1985·Granted May 9, 1989·1 cites·3 claims
- 3332US4546138AProcess for the production of polyamide imides by using a phenol in the workup of the materialBAYER AG·Filed 1984·Granted Oct 8, 1985·1 cites·3 claims
- 3431US4281140AProcess for the preparation of hydantoinsBAYER AG·Filed 1979·Granted Jul 28, 1981·0 cites·4 claims
- 3530US4908429ASpecial polyimides as thermoplastsBAYER AG·Filed 1988·Granted Mar 13, 1990·0 cites·6 claims
- 3630US4212982APolyisocyanates with at least one hydantoin or thiohydantoin ring substituted by carboxylic acid amide groupsBAYER AG·Filed 1978·Granted Jul 15, 1980·0 cites·4 claims
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