Inventor · disambiguated record
Charles D. Morrill
Also filed as: MORRILL CHARLES D · MORRILL CHARLES DONOVAN
33 granted patents·1,387 citations·filing 1974–1998
98Inventor score
Files withHYDRIL CO16SMITH INTERNATIONAL10MCEVOY OILFIELD EQUIPMENT CO5GOODYEAR AEROSPACE CORP1MORRILL CHARLES DONOVAN1
Top patents by PatentIndex Score
33 records- 0198US5655745ALow profile and lightweight high pressure blowout preventerHYDRIL CO·Filed 1996·Granted Aug 12, 1997·126 cites·6 claims
- 0295US4502534AFlow diverterHYDRIL CO·Filed 1982·Granted Mar 5, 1985·145 cites·8 claims
- 0395US4444250AFlow diverterHYDRIL CO·Filed 1982·Granted Apr 24, 1984·188 cites·5 claims
- 0492US4097069AMarine riser connectorMCEVOY OILFIELD EQUIPMENT CO·Filed 1976·Granted Jun 27, 1978·66 cites·33 claims
- 0591US4363465AExtreme temperature, high pressure balanced, rising stem gate valve with super preloaded, stacked, solid lubricated, metal-to-metal sealSMITH INTERNATIONAL·Filed 1976·Granted Dec 14, 1982·49 cites·28 claims
- 0689US4496173AThreaded couplingHYDRIL CO·Filed 1983·Granted Jan 29, 1985·86 cites·34 claims
- 0788US6173770B1Shear ram for ram-type blowout preventerHYDRIL CO·Filed 1998·Granted Jan 16, 2001·125 cites·8 claims
- 0888US4264054AMetal-to-metal seat hub sealsMCEVOY OILFIELD EQUIPMENT CO·Filed 1978·Granted Apr 28, 1981·41 cites·5 claims
- 0979US4056272ASealMORRILL CHARLES DONOVAN·Filed 1975·Granted Nov 1, 1977·46 cites·15 claims
- 1076US5645098ALow profile and lightweight high pressure blowout preventerHYDRIL CO·Filed 1996·Granted Jul 8, 1997·24 cites·3 claims
- 1176US4554976ATest tool for subsea blowout preventer stackHYDRIL CO·Filed 1983·Granted Nov 26, 1985·47 cites·26 claims
- 1275US4109942ASealMCEVOY OILFIELD EQUIPMENT CO·Filed 1977·Granted Aug 29, 1978·36 cites·14 claims
- 1373US5343946AHigh pressure packer for a drop-in check valveHYDRIL CO·Filed 1993·Granted Sep 6, 1994·56 cites·23 claims
- 1471US4346919ARemote automatic make-up stab-in sealing systemSMITH INTERNATIONAL·Filed 1978·Granted Aug 31, 1982·30 cites·24 claims
- 1566US4513823ACylindrical gate valve apparatus and methodHYDRIL CO·Filed 1983·Granted Apr 30, 1985·30 cites·18 claims
- 1666US4476935ASafety valve apparatus and methodHYDRIL CO·Filed 1983·Granted Oct 16, 1984·30 cites·37 claims
- 1764US5255890ARam type blowout preventerHYDRIL CO·Filed 1993·Granted Oct 26, 1993·34 cites·4 claims
- 1863US4402773ARemote automatic make-up stab-in sealing systemSMITH INTERNATIONAL·Filed 1978·Granted Sep 6, 1983·24 cites·7 claims
- 1962US5647572ALow profile and lightweight high pressure blowout preventerHYDRIL CO·Filed 1996·Granted Jul 15, 1997·14 cites·4 claims
- 2060US4382717AConnection of underwater linesSMITH INTERNATIONAL·Filed 1981·Granted May 10, 1983·25 cites·24 claims
- 2156US4476897AFlowline connector sealSMITH INTERNATIONAL·Filed 1982·Granted Oct 16, 1984·21 cites·38 claims
- 2252US6089321APressure balanced choke and kill line connectorHYDRIL CO·Filed 1998·Granted Jul 18, 2000·28 cites·6 claims
- 2352US3987419AHigh speed information processing systemGOODYEAR AEROSPACE CORP·Filed 1974·Granted Oct 19, 1976·17 cites·8 claims
- 2450US5642872ALow profile and lightweight high pressure blowout preventerHYDRIL CO·Filed 1996·Granted Jul 1, 1997·8 cites·5 claims
- 2549US5638855ALow profile and lightweight high pressure blowout preventerHYDRIL CO·Filed 1996·Granted Jun 17, 1997·8 cites·3 claims
- 2648US4371291AUnderwater flowline connectorSMITH INTERNATIONAL·Filed 1980·Granted Feb 1, 1983·19 cites·36 claims
- 2747US4477205AApparatus for connecting underwater flow line hubsSMITH INTERNATIONAL·Filed 1982·Granted Oct 16, 1984·14 cites·10 claims
- 2847US4229027ARemote automatic make-up stab-in sealing systemMCEVOY OILFIELD EQUIPMENT CO·Filed 1977·Granted Oct 21, 1980·12 cites·26 claims
- 2944US4579372AFlowline connector sealSMITH INTERNATIONAL·Filed 1982·Granted Apr 1, 1986·13 cites·22 claims
- 3042US4329085AConnection of underwater linesSMITH INTERNATIONAL·Filed 1978·Granted May 11, 1982·13 cites·30 claims
- 3139US4371005AProtective cover for underwater flow line hubSMITH INTERNATIONAL·Filed 1979·Granted Feb 1, 1983·8 cites·13 claims
- 3231USRE37538ERam type blowout preventerHYDRIL CO·Filed 1995·Granted Feb 5, 2002·4 cites·9 claims
- 3324US4228704AMarine riser toolMCEVOY OILFIELD EQUIPMENT CO·Filed 1978·Granted Oct 21, 1980·0 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →