US2989976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam trap control valve
Assignee: Yarnall Waring Co
•
Filing: 1959-05-06
•
Granted: 1961-06-27
•
Expires: 1979-05-06
Abstract
No abstract record available.
Inventors
- 👤 Walter J Kinderman
- 👤 Frank W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:51
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/38; F16T1/12; F16T1/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49439
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US795448A
Cited
US1748402A
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US1721630A
Cited
US2051732A
Cited
US2127649A
Cited
US2246078A
Cited
US2407561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |