US2027812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A process for preparing basic titanic oxalate
Assignee: Peter Spence and Sons Ltd
•
Filing: 1932-04-06
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Granted: 1936-01-14
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Expires: 1952-04-06
Abstract
No abstract record available.
Inventors
- 👤 Crundall Sydney Franci William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:42
CPC Classifications
C; C01; C01G; C01G23/00; C07; C07C; C07C51/00; C07C51/41; C07C51/412
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) | 1939-01-13 | 1939-07-15 | 1940-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-01-13 | 1943-07-15 | 1944-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-01-13 | 1947-07-15 | 1948-01-14 | $7700.00 | Window Closed / Lapsed |