US2730386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricated stuffing box
Assignee: Blaw Knox Co
•
Filing: 1950-05-18
•
Granted: 1956-01-10
•
Expires: 1970-05-18
Abstract
No abstract record available.
Inventors
- 👤 Shields James Rodger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:43
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/182; F16J15/183; Y; Y10; Y10S; Y10S277/00; Y10S277/927; Y10S277/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US774270A
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US1994169A
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US2017290A
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US2320589A
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US2649318A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |