US2615437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating internal-combustion engines
Assignee: Individual
•
Filing: 1942-05-13
•
Granted: 1952-10-28
•
Expires: 1962-05-13
Abstract
No abstract record available.
Inventors
- 👤 Neil O Broderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:27
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1004; F02B19/1014; F02B19/1019; F02B19/108; F02B19/1085; F02B19/109; F02B2275/00; F02B2275/22; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |