Patent US3579111A successfully refreshed from Google Patents.
Patent US3147222A successfully refreshed from Google Patents.
US3147222A
Expired / Lapsed
US
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Compositions comprising a petroleum liquid and an nu-vinyl pyrrolidinaone polymer
Assignee: Rohm and Haas Co
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Filing: 1958-03-05
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Granted: 1964-09-01
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Expires: 1978-03-05
Abstract
No abstract record available.
Inventors
- 👤 La Verne N Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/146; C10L1/22; C10L1/234; C10L1/236; C10L1/2368; C10L1/24; C10L1/2462; C10L1/2468
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AS A NEW COMPOSITION OF MATTER, A MINERAL OIL HAVING DISSOLVED THEREIN A MINOR PROPORTION IMPORTING DISPERSING ACTION OF A COPOLYMER OF AN N-VINYL PYRROLIDINONE AND AT LEAST ONE ACRYLIC ESTER ROOCC(RX)=CH2, THE NVINYL PYRROLIDONE SUPPLYING ABOUT 5% TO 30% BY WEIGHT OF THE COPOLYMER AND R BEING THE ALKYL PORTION OF THE SAID ESTER AND OF SUFFICIENT SIZE TO PROVIDE SOLUBILITY OF THE COPOLYMER IN THE OIL AND HAVING AN AVERAGE SIZE OF AT LEAST EIGHT CARBON ATOMS, IN THE FORMULA RX REPRESENTING A MEMBER OF THE CLASS CONSISTING OF HYDROGEN AND THE METHYL GROUP.
Claim 2
Dependent Claim
96 words
AS A NEW COMPOSITION OF MATTER, A MINERAL OIL HAVING DISSOLVED THEREIN A MINOR PROPORTION IMPORTING DISPERSING ACTION OF A COPOLYMER OF AN N-VINYL PYRROLIDINONE AND AT LEAST ONE ACRYLIC ESTER ROOCC(RX)=CH2, THE NVINYL PYRROLIDONE SUPPLYING ABOUT 5% TO 30% BY WEIGHT OF THE COPOLYMER AND R BEING THE ALKYL PORTION OF THE SAID ESTER AND OF SUFFICIENT SIZE TO PROVIDE SOLUBILITY OF THE COPOLYMER IN THE OIL AND HAVING AN AVERAGE SIZE OF AT LEAST EIGHT CARBON ATOMS, IN THE FORMULA RX REPRESENTING A MEMBER OF THE CLASS CONSISTING OF HYDROGEN AND THE METHYL GROUP.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |