US2839089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packed safety lock pipe coupling with removable grip annulus
Assignee: Mcdowell Manufacturing Co
•
Filing: 1954-03-09
•
Granted: 1958-06-17
•
Expires: 1974-03-09
Abstract
No abstract record available.
Inventors
- 👤 Clyde E Richard
- 👤 Gustav A Hempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:04
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/50; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49876; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US554666A
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US1771949A
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US2111956A
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US2127086A
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US2398399A
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US2479960A
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US2587810A
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US2638362A
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US2653042A
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US2590565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |