Patent US3404864A successfully refreshed from Google Patents.
US3404864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valve with concave seating surface
Assignee: Individual
•
Filing: 1966-12-27
•
Granted: 1968-10-08
•
Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Robert R Reddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:31
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/06; F16K5/0621; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49995; Y10T29/49996
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE24102E
Cited
US1947071A
Cited
US2534477A
Cited
US2777664A
Cited
US2883147A
Cited
US2977987A
Cited
US3314643A
Cited
US3220694A
Cited
US3350055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |