Patent US2061111A successfully refreshed from Google Patents.
US2061111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of anti-oxidants
Assignee: Gulf Oil Corp
•
Filing: 1933-12-13
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Granted: 1936-11-17
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Expires: 1953-12-13
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 William A Gruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:54
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/183; C10L1/1832; C08; C08K; C08K11/00
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) | 1939-11-17 | 1940-05-18 | 1940-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-11-17 | 1944-05-18 | 1944-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-11-17 | 1948-05-18 | 1948-11-17 | $7700.00 | Window Closed / Lapsed |