Patent US3777912A successfully refreshed from Google Patents.
US1750160A
Expired / Lapsed
US
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Compound of cobalt cyanate with alpha tertiary base
Assignee: WALTER O SNELLING
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Filing: 1928-04-16
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Granted: 1930-03-11
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Expires: 1948-04-16
Abstract
No abstract record available.
Inventors
- 👤 Tenney L Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:37
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/06; C07F15/065; C01; C01C; C01C3/00; C01C3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-03-10 | 1933-09-09 | 1934-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-03-10 | 1937-09-09 | 1938-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-03-10 | 1941-09-09 | 1942-03-11 | $7700.00 | Window Closed / Lapsed |