US2473254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston with annular heat dam in the head
Assignee: RA Lister and Co Ltd
•
Filing: 1946-01-05
•
Granted: 1949-06-14
•
Expires: 1966-01-05
Abstract
No abstract record available.
Inventors
- 👤 Morris Alberto Jorge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:10
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/02; F02F3/04; F02F3/08; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0603; F02B23/0675; F02B2023/0612; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/04; F05C2201/0433; F05C2201/0448; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE298033C
Cited
US1270374A
Cited
US1462084A
Cited
US1405887A
Cited
US1462655A
Cited
US1946081A
Cited
US2336918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |