US2265496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot valve
Assignee: Penn Electric Switch Co
•
Filing: 1940-05-13
•
Granted: 1941-12-09
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Expires: 1960-05-13
Abstract
No abstract record available.
Inventors
- 👤 Burton E Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:16
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/86984
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) | 1944-12-08 | 1945-06-09 | 1945-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-08 | 1949-06-09 | 1949-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-08 | 1953-06-09 | 1953-12-09 | $7700.00 | Window Closed / Lapsed |