US2871072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston sealing assemblies
Assignee: PARKERSBURG AETNA CORP
•
Filing: 1954-07-15
•
Granted: 1959-01-27
•
Expires: 1974-07-15
Abstract
No abstract record available.
Inventors
- 👤 Asbury S Parks
- 👤 O'bannon William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:08
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F04; F04B; F04B47/00; F04B47/14; F04B47/145; Y; Y10; Y10S; Y10S277/00; Y10S277/907; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2154
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |