Patent US2237627A successfully refreshed from Google Patents.
US2237627A
Expired / Lapsed
US
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Sulphurization of organic polysulphides
Assignee: SHARPLES SOLVENTS Corp
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Filing: 1939-10-10
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Granted: 1941-04-08
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Expires: 1959-10-10
Abstract
No abstract record available.
Inventors
- 👤 John F Olin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:31
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/22; C07C319/24; C07B; C07B45/00; C07B45/06
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) | 1944-04-07 | 1944-10-07 | 1945-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-07 | 1948-10-07 | 1949-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-07 | 1952-10-07 | 1953-04-08 | $7700.00 | Window Closed / Lapsed |