US2909164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-cylinder internal combustion engines
Assignee: Individual
•
Filing: 1955-07-01
•
Granted: 1959-10-20
•
Expires: 1975-07-01
Abstract
No abstract record available.
Inventors
- 👤 Arnold E Biermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/04; F02B75/048; F02B75/16; F02B75/18; F02B75/22; F02B75/228; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18176
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR720427A
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DE748336C
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US2493718A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |