US2009649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level control valve
Assignee: OSCAR F CARLSON Co
•
Filing: 1934-03-08
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Granted: 1935-07-30
•
Expires: 1954-03-08
Abstract
No abstract record available.
Inventors
- 👤 Oscar F Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:11
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7439; Y10T137/7475
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-07-29 | 1939-01-28 | 1939-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-29 | 1943-01-28 | 1943-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-29 | 1947-01-28 | 1947-07-30 | $7700.00 | Window Closed / Lapsed |