US2055031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timer with interchangeable formula for controlling machines having series of operations
Assignee: Prosperity Co Inc
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Filing: 1930-11-07
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Granted: 1936-09-22
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Expires: 1950-11-07
Abstract
No abstract record available.
Inventors
- 👤 Walter B Hutchings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:00
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10; H01H43/12; H01H43/124; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86397; Y10T137/86405; Y10T137/86421; Y10T137/86429; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
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) | 1939-09-22 | 1940-03-23 | 1940-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-09-22 | 1944-03-23 | 1944-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-09-22 | 1948-03-23 | 1948-09-22 | $7700.00 | Window Closed / Lapsed |