US2822191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling with pipe engaging pivot lugs
Assignee: Dresser Industries Inc
•
Filing: 1952-07-11
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Granted: 1958-02-04
•
Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Roger E Risley
- 👤 George D Kish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/08; F16L27/00; F16L27/12; F16L27/127; F16L27/1275; F16L27/12751
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US552319A
Cited
GB191102765A
Cited
US1620094A
Cited
DE422052C
Cited
US1904967A
Cited
US1853168A
Cited
US2272515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |