US2450693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston assembly and ring
Assignee: Individual
•
Filing: 1945-10-29
•
Granted: 1948-10-05
•
Expires: 1965-10-29
Abstract
No abstract record available.
Inventors
- 👤 Sanders Edna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:56
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/005; F16J1/006; F16J1/008; F04; F04B; F04B53/00; F04B53/14; F04B53/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1796415A
Cited
US2189839A
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US2267882A
Cited
US2188106A
Cited
US2306800A
Cited
US2306838A
Cited
US2274927A
Cited
US2277501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |