Patent US5708749A successfully refreshed from Google Patents.
Patent US2463568A successfully refreshed from Google Patents.
US2463568A
Expired / Lapsed
US
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Shaft seal construction
Assignee: Individual
•
Filing: 1945-08-11
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Granted: 1949-03-08
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Expires: 1965-08-11
Abstract
No abstract record available.
Inventors
- 👤 Shelton Benjamin Jarnigan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:49
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US321710A
Cited
US602374A
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US1001687A
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US1105268A
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US1749590A
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US1594838A
Cited
US1919248A
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US2248405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |