US2770474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved separable coupling
Assignee: Individual
•
Filing: 1952-12-23
•
Granted: 1956-11-13
•
Expires: 1972-12-23
Abstract
No abstract record available.
Inventors
- 👤 John T Krapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/12; F16L37/18; F16L37/28; F16L37/38; F16L37/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US770570A
Cited
US769688A
Cited
US1064862A
Cited
US1278300A
Cited
US2361866A
Cited
US2441075A
Cited
US2634927A
Cited
US2690917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |