Patent US1991999A successfully refreshed from Google Patents.
US1991999A
Expired / Lapsed
US
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Squalene derivative and process of making the same
Assignee: Imperial Chemical Industries Ltd
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Filing: 1931-01-14
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Granted: 1935-02-19
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Expires: 1951-01-14
Abstract
No abstract record available.
Inventors
- 👤 Bunbury Hugh Mills
- 👤 Archibald Wilfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:38
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/12; C07C39/14; C07C37/00; C07C37/11; C07C37/18; C07C39/24; C07C39/367; C07C39/38
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) | 1938-02-18 | 1938-08-20 | 1939-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-18 | 1942-08-20 | 1943-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-18 | 1946-08-20 | 1947-02-19 | $7700.00 | Window Closed / Lapsed |