Assignee
EVANS ROBERT F
18 granted patents·816 citations·filing 1978–1988
Top patents by PatentIndex Score
18 records- 0197US4386669ADrill bit with yielding support and force applying structure for abrasion cutting elementsEVANS ROBERT F·Filed 1980·Granted Jun 7, 1983·190 cites·14 claims
- 0295US4307786ABorehole angle control by gage corner removal effects from hydraulic fluid jetEVANS ROBERT F·Filed 1979·Granted Dec 29, 1981·118 cites·8 claims
- 0391US4151051AElectrodeposition mining of materials from natural water bodiesEVANS ROBERT F·Filed 1978·Granted Apr 24, 1979·30 cites·19 claims
- 0490US4291773AStrictive material deflectable collar for use in borehole angle controlEVANS ROBERT F·Filed 1979·Granted Sep 29, 1981·70 cites·24 claims
- 0588US4335791APressure compensator and lubricating reservoir with improved response to substantial pressure changes and adverse environmentEVANS ROBERT F·Filed 1981·Granted Jun 22, 1982·77 cites·21 claims
- 0687US4262758ABorehole angle control by gage corner removal from mechanical devices associated with drill bit and drill stringEVANS ROBERT F·Filed 1979·Granted Apr 21, 1981·61 cites·21 claims
- 0784US4211292ABorehole angle control by gage corner removal effectsEVANS ROBERT F·Filed 1978·Granted Jul 8, 1980·51 cites·64 claims
- 0879US4287957ACooling a drilling tool component with a separate flow stream of reduced-temperature gaseous drilling fluidEVANS ROBERT F·Filed 1980·Granted Sep 8, 1981·50 cites·23 claims
- 0974US4346591ASensing impending sealed bearing and gage failureEVANS ROBERT F·Filed 1981·Granted Aug 31, 1982·39 cites·20 claims
- 1062US4245644ABreast prosthesis or augmenting form including spring-mass systemEVANS ROBERT F·Filed 1978·Granted Jan 20, 1981·18 cites·15 claims
- 1161US4386458AFatigue resistance for coupling and connection joint mechanismsEVANS ROBERT F·Filed 1981·Granted Jun 7, 1983·18 cites·12 claims
- 1257US4478295ATuned support for cutting elements in a drag bitEVANS ROBERT F·Filed 1982·Granted Oct 23, 1984·22 cites·10 claims
- 1356US4494749ASeal assembliesEVANS ROBERT F·Filed 1981·Granted Jan 22, 1985·20 cites·17 claims
- 1455US4886130ANutational technique for limiting well bore deviationEVANS ROBERT F·Filed 1988·Granted Dec 12, 1989·24 cites·10 claims
- 1546US4209684AFusion technique of assembling rotary drill bit and adjusting gage of cutting elementsEVANS ROBERT F·Filed 1979·Granted Jun 24, 1980·6 cites·22 claims
- 1645US4240674APositive lubricating and indexing bearing assemblyEVANS ROBERT F·Filed 1979·Granted Dec 23, 1980·11 cites·31 claims
- 1737US4294492ACaliper seal assemblyEVANS ROBERT F·Filed 1980·Granted Oct 13, 1981·7 cites·20 claims
- 1837US4240586AMethod and apparatus for crushing and classifying particulate materialEVANS ROBERT F·Filed 1978·Granted Dec 23, 1980·4 cites·58 claims
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