Patent US3418333A successfully refreshed from Google Patents.
US3418333A
Expired / Lapsed
US
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Salts of imidazoles and benzimidozoles
Assignee: Shell USA Inc
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Filing: 1967-07-20
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Granted: 1968-12-24
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Expires: 1987-07-20
Abstract
No abstract record available.
Inventors
- 👤 Warren Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:29
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G59/5093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2005538A
Cited
US2404299A
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US2404300A
Cited
US2846411A
Cited
US2944062A
Cited
US3080282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |