Patent US3443108A successfully refreshed from Google Patents.
US2648554A
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US
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Inflatable standby seal for stationary, revolving, sliding, and rocking tubes and the like and shafts and the like
Assignee: Syntron Co
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Filing: 1949-07-21
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Granted: 1953-08-11
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Expires: 1969-07-21
Abstract
No abstract record available.
Inventors
- 👤 Sr Walter J Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:50
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/46; Y; Y10; Y10S; Y10S277/00; Y10S277/908; Y10S277/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US632442A
Cited
GB191003503A
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US2038140A
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FR799867A
Cited
US2212588A
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US2193887A
Cited
US2329028A
Cited
US2399544A
Cited
US2487177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |