US2466428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston seal
Assignee: Weatherhead Co
•
Filing: 1945-06-20
•
Granted: 1949-04-05
•
Expires: 1965-06-20
Abstract
No abstract record available.
Inventors
- 👤 George H Hufferd
- 👤 Paquin Joseph Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:53
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; Y; Y10; Y10S; Y10S277/00; Y10S277/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US454093A
Cited
US770926A
Cited
US788769A
Cited
GB190702216A
Cited
GB191119660A
Cited
FR800828A
Cited
US2303798A
Cited
US2349170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-04 | 1952-10-04 | 1953-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-04 | 1956-10-04 | 1957-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-04 | 1960-10-04 | 1961-04-05 | $7700.00 | Window Closed / Lapsed |