US2852284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid seal for rotating shafts
Assignee: Individual
•
Filing: 1955-07-08
•
Granted: 1958-09-16
•
Expires: 1975-07-08
Abstract
No abstract record available.
Inventors
- 👤 Roy E Bryson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:13
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; F16J15/3408; F16J15/3412; F16J15/3416
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1507428A
Cited
US1667992A
Cited
US1683756A
Cited
US2021346A
Cited
US2232648A
Cited
US2708126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |