US2444440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine
Assignee: Nordberg Manufacturing Co
•
Filing: 1946-09-27
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Granted: 1948-07-06
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Expires: 1966-09-27
Abstract
No abstract record available.
Inventors
- 👤 Grieshaber Emil
- 👤 Karl V Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:10
CPC Classifications
F; F02; F02D; F02D9/00; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222; F02M; F02M21/00; F02M21/02; F02M21/0218; F02M21/0248; F02M21/0251; F02M21/0257; F02M21/026; F02M21/0269; F02M21/029; F02B75/02; F02B2075/022; F02B2075/025; F02D2700/00; F02D2700/02; F02D2700/0202; F02D2700/0215; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |