US2873127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical seal
Assignee: Worthington Corp
•
Filing: 1956-03-01
•
Granted: 1959-02-10
•
Expires: 1976-03-01
Abstract
No abstract record available.
Inventors
- 👤 Pratt M Marguerite
- 👤 Jr Charles L Farr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:52
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3464
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1926007A
Cited
US2432576A
Cited
US2425209A
Cited
US2436866A
Cited
FR995663A
Cited
FR1054739A
Cited
GB695087A
Cited
US2670973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |