US2708588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved test plug
Assignee: MECHANICAL PRODUCTS Corp
•
Filing: 1954-04-12
•
Granted: 1955-05-17
•
Expires: 1974-04-12
Abstract
No abstract record available.
Inventors
- 👤 Harry F Prah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:56
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/132
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1939978A
Cited
US1962740A
Cited
US2444444A
Cited
US2444451A
Cited
US2484924A
Cited
GB676950A
Cited
US2672999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |