US2481793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid sealing device
Assignee: Individual
•
Filing: 1946-05-11
•
Granted: 1949-09-13
•
Expires: 1966-05-11
Abstract
No abstract record available.
Inventors
- 👤 John H F Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/24; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53909; Y10T29/53913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1992790A
Cited
US2100113A
Cited
US2037046A
Cited
US2092237A
Cited
US2332763A
Cited
US2405120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |