US2420589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: ROHLM Manufacturing Co Inc
•
Filing: 1943-12-13
•
Granted: 1947-05-13
•
Expires: 1963-12-13
Abstract
No abstract record available.
Inventors
- 👤 Dunnihoo John Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:04
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F16K11/14; F16K11/16; F16K11/163; F16K11/166; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US544743A
Cited
US948404A
Cited
US1270154A
Cited
FR611167A
Cited
US1737427A
Cited
US2055122A
Cited
US2219982A
Cited
US2332695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |