Patent US2915376A successfully refreshed from Google Patents.
US2915376A
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Perfluoroalkylimidazolines and compositions containing the same
Assignee: Shell Development Co
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Filing: 1956-05-28
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Granted: 1959-12-01
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Philip J Raifsnider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:23
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A COMPOSITION CONSISTING ESSENTIALLY OF A PETROLEUM HYDROCARBON HAVING DISPERSED THERETHROUGH A MINOR EFFECTIVE CORROSION-INHIBITING AMOUNT OF A PERFLUOROALKYLIMIDAZOLIE COMPOUND OF THE GROUP CONSISTING OF PERFLUORO ALKYLIMIDAZOLINES HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
31 words
A COMPOSITION CONSISTING ESSENTIALLY OF A PETROLEUM HYDROCARBON HAVING DISPERSED THERETHROUGH A MINOR EFFECTIVE CORROSION-INHIBITING AMOUNT OF A PERFLUOROALKYLIMIDAZOLIE COMPOUND OF THE GROUP CONSISTING OF PERFLUORO ALKYLIMIDAZOLINES HAVING THE GENERAL FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |