US2210877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphurizing chemical compounds
Assignee: Union Oil Company of California
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Filing: 1937-01-12
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Granted: 1940-08-13
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Expires: 1957-01-12
Abstract
No abstract record available.
Inventors
- 👤 Ulric B Bray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:13
CPC Classifications
C; C07; C07G; C07G99/00; C07G99/002; C07G99/0022
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) | 1943-08-13 | 1944-02-12 | 1944-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-08-13 | 1948-02-12 | 1948-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-08-13 | 1952-02-12 | 1952-08-13 | $7700.00 | Window Closed / Lapsed |