US2776650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engines
Assignee: Individual
•
Filing: 1952-04-29
•
Granted: 1957-01-08
•
Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Zimmermann Hans Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:27
CPC Classifications
F; F02; F02B; F02B25/00; F02B2720/00; F02B2720/13; F02B2720/133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1313534A
Cited
GB191416865A
Cited
US1104596A
Cited
US1114521A
Cited
US1350260A
Cited
DE358156C
Cited
US1510620A
Cited
US1725139A
Cited
US1686236A
Cited
US2288018A
Cited
FR887434A
Cited
US2464228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |