US2900971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Worthington Corp
•
Filing: 1956-10-02
•
Granted: 1959-08-25
•
Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 William M Kauffmann
- 👤 Ueberschaer Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:55
CPC Classifications
F; F02; F02M; F02M69/00; F02B; F02B2720/00; F02B2720/15; F02B2720/153
Claims Analysis
Total Claims: 0
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US2692591A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |