US2830619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protected valve seal
Assignee: Individual
•
Filing: 1954-09-20
•
Granted: 1958-04-15
•
Expires: 1974-09-20
Abstract
No abstract record available.
Inventors
- 👤 Walter C Hollander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:22
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/08; F16K1/00; F16K1/32; F16K1/34; F16K1/46; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1385019A
Cited
FR678371A
Cited
US2393076A
Cited
US2517061A
Cited
US2486246A
Cited
US2650455A
Cited
US2660493A
Cited
US2676040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |