Patent US2901274A successfully refreshed from Google Patents.
US2901274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sleeve type pipe coupling having sheet metal followers
Assignee: Individual
•
Filing: 1956-04-09
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Granted: 1959-08-25
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Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 Telford L Smith
- 👤 Paul G Dunmire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:14
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US644393A
Cited
US675730A
Cited
US1004004A
Cited
US1189147A
Cited
US1671789A
Cited
US1853168A
Cited
US2853318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |