US2548957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valved coupling
Assignee: Individual
•
Filing: 1947-07-05
•
Granted: 1951-04-17
•
Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Rosa Stephen P Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:14
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/58; F16L37/28; F16L37/30; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4252; Y10T137/8593; Y10T137/877; Y10T137/87788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US250823A
Cited
US769688A
Cited
US1073719A
Cited
US1207392A
Cited
US1762823A
Cited
US1850111A
Cited
US1878303A
Cited
US2397265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |