US3447313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged two stroke cycle internal combustion piston engine
Assignee: Sulzer AG
•
Filing: 1967-10-02
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Granted: 1969-06-03
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Expires: 1987-10-02
Abstract
No abstract record available.
Inventors
- 👤 Richard Stoffel
- 👤 Gosen Joop Hellingman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:42
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/02; F02B33/06; F02B33/10; F02B33/12; F02B29/00; F02B29/04; F02B29/045; F02B29/0475; F02B33/14; F02B33/44; F02B37/00; F02B37/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2924069A
Cited
US1955620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |