Patent US1724447A successfully refreshed from Google Patents.
Patent US2071482A successfully refreshed from Google Patents.
US2071482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifreeze
Assignee: Standard Oil Development Co
•
Filing: 1934-01-31
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Granted: 1937-02-23
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Expires: 1954-01-31
Abstract
No abstract record available.
Inventors
- 👤 Winning Carl
- 👤 John B Holtzclaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:38
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/20
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) | 1940-02-23 | 1940-08-24 | 1941-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-23 | 1944-08-24 | 1945-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-23 | 1948-08-24 | 1949-02-23 | $7700.00 | Window Closed / Lapsed |