US1824938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston process and apparatus
Assignee: Individual
•
Filing: 1926-10-25
•
Granted: 1931-09-29
•
Expires: 1946-10-25
Abstract
No abstract record available.
Inventors
- 👤 Voorhees Gardner Tufts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:03
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B9/04; F04B9/047; F04B39/00; F04B39/02; F04B39/10; F04B39/102; F04B39/1033; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/21; Y10T74/2101
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) | 1934-09-28 | 1935-03-30 | 1935-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-09-28 | 1939-03-30 | 1939-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-09-28 | 1943-03-30 | 1943-09-29 | $7700.00 | Window Closed / Lapsed |