Patent US2561884A successfully refreshed from Google Patents.
US2561884A
Expired / Lapsed
US
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Pipe joint
Assignee: Individual
•
Filing: 1946-06-19
•
Granted: 1951-07-24
•
Expires: 1966-06-19
Abstract
No abstract record available.
Inventors
- 👤 Warren C Perrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:55
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US126624A
Cited
US1083350A
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DE392932C
Cited
US1947881A
Cited
US2230725A
Cited
US2219289A
Cited
US2274323A
Cited
US2280183A
Cited
US2314386A
Cited
US2372095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |