Patent US2436896A successfully refreshed from Google Patents.
US2436896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston packing
Assignee: Perfect Circle Corp
•
Filing: 1939-12-16
•
Granted: 1948-03-02
•
Expires: 1959-12-16
Abstract
No abstract record available.
Inventors
- 👤 Arden J Mummert
- 👤 Harold P Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:42
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; F16J9/066; F16J9/067; F16J9/12; F16J9/20; F16J9/203
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US307831A
Cited
US1529052A
Cited
US1707035A
Cited
US1773250A
Cited
US2025299A
Cited
US2175409A
Cited
US2231801A
Cited
US2154342A
Cited
US2220947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-02 | 1951-09-01 | 1952-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-02 | 1955-09-01 | 1956-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-02 | 1959-09-01 | 1960-03-02 | $7700.00 | Window Closed / Lapsed |