US1989870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1932-09-30
•
Granted: 1935-02-05
•
Expires: 1952-09-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert C Lafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:03
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/18; F16K15/182; F16K15/1823; F16K15/02; F16K15/04; F16K15/044; Y; Y10; Y10S; Y10S137/00; Y10S137/901; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7914; Y10T137/7922; Y10T137/7927; Y10T137/7928
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) | 1938-02-04 | 1938-08-06 | 1939-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-04 | 1942-08-06 | 1943-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-04 | 1946-08-06 | 1947-02-05 | $7700.00 | Window Closed / Lapsed |