Patent US2828983A successfully refreshed from Google Patents.
US2828983A
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Sectional rotary seal with radially contacting sealing surfaces
Assignee: Individual
•
Filing: 1954-01-18
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Granted: 1958-04-01
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Expires: 1974-01-18
Abstract
No abstract record available.
Inventors
- 👤 James E Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:52
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3464; F16J15/3488; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US811642A
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US1097074A
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US1294620A
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US1460764A
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US2040429A
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US2247505A
Cited
US2433589A
Cited
FR909976A
Cited
US2567809A
Cited
US2628852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |