US1967987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: INTERNAT ENGINEERING CORP
•
Filing: 1931-06-18
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Granted: 1934-07-24
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Expires: 1951-06-18
Abstract
No abstract record available.
Inventors
- 👤 Robert J Broege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:03
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/04; F02M47/00; F02M47/02; F02M61/10; F02M2700/00; F02M2700/07; F02M2700/074
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) | 1937-07-23 | 1938-01-22 | 1938-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-23 | 1942-01-22 | 1942-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-23 | 1946-01-22 | 1946-07-24 | $7700.00 | Window Closed / Lapsed |