US1683602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine-cooling system
Assignee: Industrial Research Corp
•
Filing: 1921-04-11
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Granted: 1928-09-11
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Expires: 1941-04-11
Abstract
No abstract record available.
Inventors
- 👤 Carl P Brockway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:58
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/04; F02F1/06; F02F1/065
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) | 1931-09-11 | 1932-03-12 | 1932-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-09-11 | 1936-03-12 | 1936-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-09-11 | 1940-03-12 | 1940-09-11 | $7700.00 | Window Closed / Lapsed |