US3438607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for evacuator
Assignee: OMARK AIR CONTROLS Inc
•
Filing: 1966-03-28
•
Granted: 1969-04-15
•
Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 Norman C Williams
- 👤 Dwight A Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:46
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/06; F16K7/063; A; A61; A61C; A61C17/00; A61C17/06; A61C17/12; Y; Y10; Y10S; Y10S604/00; Y10S604/902
Claims Analysis
Total Claims: 0
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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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |