US2483571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of organic substances with phosphorous sesquisulfide
Assignee: Pure Oil Co
•
Filing: 1945-12-20
•
Granted: 1949-10-04
•
Expires: 1965-12-20
Abstract
No abstract record available.
Inventors
- 👤 Elmer W Brennan
- 👤 Norman D Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:53
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/04; C10M2223/00; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142998A
Cited
US2133310A
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US2211231A
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US2355106A
Cited
US2308427A
Cited
US2382121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |