Patent US2604309A successfully refreshed from Google Patents.
US2604309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine accessory
Assignee: Individual
•
Filing: 1945-07-13
•
Granted: 1952-07-22
•
Expires: 1965-07-13
Abstract
No abstract record available.
Inventors
- 👤 Bruin Milton H De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:23
CPC Classifications
F; F02; F02D; F02D19/00; F02D19/12; F02M; F02M25/00; F02M25/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1564039A
Cited
US1802321A
Cited
US1566382A
Cited
US2002483A
Cited
US2031527A
Cited
US2103368A
Cited
US2135431A
Cited
US2142979A
Cited
US2319773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |