US2490985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin sulfide addition products
Assignee: Phillips Petroleum Co
•
Filing: 1948-07-26
•
Granted: 1949-12-13
•
Expires: 1968-07-26
Abstract
No abstract record available.
Inventors
- 👤 Harold R Snyder
- 👤 John M Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/14; C07C319/18; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE696774C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |