US2983479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge valve and operating mechanism
Assignee: Waterous Co
•
Filing: 1958-09-11
•
Granted: 1961-05-09
•
Expires: 1978-09-11
Abstract
No abstract record available.
Inventors
- 👤 David F Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:41
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/53; F16K31/54; F16K5/00; F16K5/06; F16K5/0647; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/188; Y10T74/18808; Y10T74/18816; Y10T74/18888; Y10T74/18976; Y10T74/19; Y10T74/19642; Y10T74/1967; Y10T74/20; Y10T74/20396; Y10T74/20468
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US270323A
Cited
US338302A
Cited
US437915A
Cited
US1203492A
Cited
FR859489A
Cited
US2665879A
Cited
US2825527A
Cited
US2821998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |