Patent US2289315A successfully refreshed from Google Patents.
Patent US2309653A successfully refreshed from Google Patents.
US2309653A
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Removal of mercaptans from mercaptan-solvent mixtures
Assignee: Atlantic Richfield Co
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Filing: 1941-03-21
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Granted: 1943-02-02
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Expires: 1961-03-21
Abstract
No abstract record available.
Inventors
- 👤 Leonard N Leum
- 👤 Edwin R Birkhimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/26; C07C319/28; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/82; C10; C10G; C10G19/00
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) | 1946-02-01 | 1946-08-03 | 1947-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-01 | 1950-08-03 | 1951-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-01 | 1954-08-03 | 1955-02-02 | $7700.00 | Window Closed / Lapsed |