Patent US2005136A successfully refreshed from Google Patents.
US2980452A
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US
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End face sealing unit
Assignee: Chicago Rawhide Manufacturing Co Inc
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Filing: 1957-01-25
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Granted: 1961-04-18
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Expires: 1977-01-25
Abstract
No abstract record available.
Inventors
- 👤 Richard T Cahill
- 👤 Edmund J Kujawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:04
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; Y; Y10; Y10S; Y10S277/00; Y10S277/928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2301723A
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US2311494A
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US2395359A
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US2341900A
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US2660834A
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US2639170A
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US2858149A
Cited
US2884267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |