US2876987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Rockwell Manufacturing Co
•
Filing: 1956-03-12
•
Granted: 1959-03-10
•
Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Anthony W Renfro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:09
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/04; F16K41/043; F16K41/046; Y; Y10; Y10S; Y10S277/00; Y10S277/905; Y10S277/91
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |