Patent US2591120A successfully refreshed from Google Patents.
US2718752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: OTTO BRENNEMANN
•
Filing: 1951-01-02
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Granted: 1955-09-27
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Rohrbach Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:43
CPC Classifications
F; F02; F02B; F02B57/00; F02B57/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US852033A
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GB113158A
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US1509885A
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US1612046A
Cited
GB267689A
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Cited
US2334561A
Cited
US2533487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |