US2743948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary seal
Assignee: Metal Seal & Products Inc
•
Filing: 1952-10-24
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Granted: 1956-05-01
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Expires: 1972-10-24
Abstract
No abstract record available.
Inventors
- 👤 August H Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:12
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US772640A
Cited
FR462424A
Cited
US1767413A
Cited
US2089570A
Cited
US2316059A
Cited
US2429953A
Cited
US2586739A
Cited
US2554595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |