US2388903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of azo-methine compounds
Assignee: Gulf Oil Corp
•
Filing: 1943-04-29
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Granted: 1945-11-13
•
Expires: 1963-04-29
Abstract
No abstract record available.
Inventors
- 👤 Troy L Cantrell
- 👤 John G Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:18
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/108331
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) | 1948-11-12 | 1949-05-14 | 1949-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-11-12 | 1953-05-14 | 1953-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-11-12 | 1957-05-14 | 1957-11-13 | $7700.00 | Window Closed / Lapsed |