US2500383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic pressure operated device
Assignee: Individual
•
Filing: 1948-04-03
•
Granted: 1950-03-14
•
Expires: 1968-04-03
Abstract
No abstract record available.
Inventors
- 👤 Harry J Sadler
- 👤 Ernest E Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/204; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T137/8593; Y10T137/86268; Y10T279/00; Y10T279/12; Y10T279/1224; Y10T279/1241; Y10T279/1249; Y10T279/1266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |