US2950930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling having fluid responsive sealing means
Assignee: Smith Blair Inc
•
Filing: 1957-07-05
•
Granted: 1960-08-30
•
Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
- 👤 Paul G Dunmire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:21
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F16L17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE507903A
Cited
US1876455A
Cited
FR741814A
Cited
DE580775C
Cited
GB550990A
Cited
US2688506A
Cited
GB681662A
Cited
CH310593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |