US2581668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbo-supercharged internal-combustion engine having implosive inlet and explosive exhaust
Assignee: Individual
•
Filing: 1945-04-13
•
Granted: 1952-01-08
•
Expires: 1965-04-13
Abstract
No abstract record available.
Inventors
- 👤 Nina K Guercken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:15
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/44; F02B37/00; F02B37/02; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1593571A
Cited
GB456989A
Cited
US1895538A
Cited
GB308595A
Cited
FR684902A
Cited
US2102559A
Cited
US2113480A
Cited
US2130721A
Cited
US2131959A
Cited
US2281585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |