Inventor · disambiguated record
Charles P. O'Farrell
Also filed as: O'FARRELL CHARLES P · O'FARRELL CHARLES PLUNKETT
15 granted patents·240 citations·filing 1974–2022
93Inventor score
Top patents by PatentIndex Score
15 records- 0193US4447338ADrilling mud viscosification agents based on sulfonated ionomersEXXON RESEARCH ENGINEERING CO·Filed 1981·Granted May 8, 1984·76 cites·10 claims
- 0292US4007149AProcess for preparing latices of sulfonated elastomersEXXON RESEARCH ENGINEERING CO·Filed 1975·Granted Feb 8, 1977·60 cites·14 claims
- 0373US4105647AProcess for sulfonating polymersEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Aug 8, 1978·15 cites·4 claims
- 0471US4119616AProcess for sulfonating unsaturated elastomers using acyl sulfatesEXXON RESEARCH ENGINEERING CO·Filed 1974·Granted Oct 10, 1978·16 cites·8 claims
- 0570US3983062ALatex from conjugated diene butyl rubberEXXON RESEARCH ENGINEERING CO·Filed 1974·Granted Sep 28, 1976·13 cites·23 claims
- 0666US4303766AProcess for sulfonating polymersEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Dec 1, 1981·11 cites·5 claims
- 0762US4118353AElastomeric compositionsEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Oct 3, 1978·10 cites·23 claims
- 0855US4131586APolymeric hydroxyalkyl sulfonatesEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Dec 26, 1978·8 cites·35 claims
- 0953US4072648AHigh tensile strength elastomeric adhesive cements and laminates therefromEXXON RESEARCH ENGINEERING CO·Filed 1974·Granted Feb 7, 1978·6 cites·7 claims
- 1050US11961035B1Enhanced geographical cachingAMAZON TECH INC·Filed 2022·Granted Apr 16, 2024·0 cites·20 claims
- 1147US4134870AElastomeric blend compositions of a sulfonated elastomeric polymerEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Jan 16, 1979·8 cites·36 claims
- 1247US4077933AProcess for preparing a sulfonated and passivated low unsaturation elastomer cementEXXON RESEARCH ENGINEERING CO·Filed 1976·Granted Mar 7, 1978·5 cites·13 claims
- 1342US4118360AOil extended elastomeric compositionsEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Oct 3, 1978·3 cites·33 claims
- 1436US4179422AElastomeric blend compositions of a sulfonated elastomer polymer and a crystalline polyolefinic thermoplastic resinEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Dec 18, 1979·4 cites·31 claims
- 1535US4117186AButyl/resin blend latex used to coat polypropylene fabricsEXXON RESEARCH ENGINEERING CO·Filed 1977·Granted Sep 26, 1978·5 cites·3 claims
Join the waitlist — get patent alerts
Get an alert when Charles P. O'Farrell files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →