US2531759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Reed Roller Bit Co
•
Filing: 1947-10-21
•
Granted: 1950-11-28
•
Expires: 1967-10-21
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Wolf
- 👤 Henry F Moller
- 👤 William M Crook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:37
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/204
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US217954A
Cited
US330800A
Cited
US524922A
Cited
US627140A
Cited
US791173A
Cited
US1995491A
Cited
US2007664A
Cited
US2306502A
Cited
US2385993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |