Patent US2606541A successfully refreshed from Google Patents.
US2606541A
Expired / Lapsed
US
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Internal-combustion engine
Assignee: Individual
•
Filing: 1948-10-06
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Granted: 1952-08-12
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Expires: 1968-10-06
Abstract
No abstract record available.
Inventors
- 👤 Lutz Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:11
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B61/00; F02B61/02; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308022A
Cited
US1322266A
Cited
US688838A
Cited
US868497A
Cited
US1219377A
Cited
US1424705A
Cited
US1425057A
Cited
US1698044A
Cited
US1661550A
Cited
FR603782A
Cited
US1672436A
Cited
FR600271A
Cited
US1812456A
Cited
US2133458A
Cited
US2192442A
Cited
US2390960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |