US2289437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphurization process
Assignee: Texaco Inc
•
Filing: 1940-09-28
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Granted: 1942-07-14
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Expires: 1960-09-28
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Knowles
- 👤 Frederic C Mccoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:41
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C07; C07B; C07B45/00; C10M2219/00; C10M2219/02; C10M2219/024; C10N; C10N2030/00; C10N2030/12; C10N2040/00; C10N2040/20; C10N2040/22
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) | 1945-07-13 | 1946-01-12 | 1946-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-13 | 1950-01-12 | 1950-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-13 | 1954-01-12 | 1954-07-14 | $7700.00 | Window Closed / Lapsed |