US2490620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakproof coupling
Assignee: PACKLESS METAL PRODUCTS Corp
•
Filing: 1947-03-07
•
Granted: 1949-12-06
•
Expires: 1967-03-07
Abstract
No abstract record available.
Inventors
- 👤 Harry W Cole
- 👤 Merrill F Sproul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:26
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/04; F16L19/043; F16L19/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US939501A
Cited
US2112239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |