US1755432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable valve-operating mechanism
Assignee: Cutler Hammer Inc
•
Filing: 1922-08-09
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Granted: 1930-04-22
•
Expires: 1942-08-09
Abstract
No abstract record available.
Inventors
- 👤 Peter P Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:49
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/46; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8175
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) | 1933-04-21 | 1933-10-21 | 1934-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-21 | 1937-10-21 | 1938-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-21 | 1941-10-21 | 1942-04-22 | $7700.00 | Window Closed / Lapsed |