US3420869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated nitrated esters
Assignee: United States Department of the Interior
•
Filing: 1967-04-13
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Granted: 1969-01-07
•
Expires: 1987-04-13
Abstract
No abstract record available.
Inventors
- 👤 John C Wekell
- 👤 Clifford R Houle
- 👤 Donald C Malins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:49
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/02; C07C203/00; C07C203/02; C07C203/04; C07C2603/00; C07C2603/02; C07C2603/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2396330A
Cited
US3215713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |