US2801764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing structure
Assignee: LUBER FINER Inc
•
Filing: 1954-12-03
•
Granted: 1957-08-06
•
Expires: 1974-12-03
Abstract
No abstract record available.
Inventors
- 👤 John K Russell
- 👤 Walter W Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:32
CPC Classifications
F; F16; F16J; F16J13/00; F16J13/02; F16J13/06; F16J13/065; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/212; Y10T292/214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1376216A
Cited
US643787A
Cited
US1043412A
Cited
FR557582A
Cited
US1871834A
Cited
US1826947A
Cited
US2665663A
Cited
US2688170A
Cited
US2709524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |