US1995612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercaptan purification
Assignee: Standard Oil Development Co
•
Filing: 1932-05-03
•
Granted: 1935-03-26
•
Expires: 1952-05-03
Abstract
No abstract record available.
Inventors
- 👤 John R Huffman
- 👤 Jr James M Whiteley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:07
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/26; C07C319/28; B; B01; B01J; B01J20/00; B01J20/02; B01J20/20; C07C319/14; C07C319/30; C10; C10G; C10G25/00; C10G25/02; C10G25/03; C10G2300/00; C10G2300/20; C10G2300/201
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) | 1938-03-25 | 1938-09-24 | 1939-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-25 | 1942-09-24 | 1943-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-25 | 1946-09-24 | 1947-03-26 | $7700.00 | Window Closed / Lapsed |