US2487947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin-walled diaphragm power unit
Assignee: Individual
•
Filing: 1945-06-22
•
Granted: 1949-11-15
•
Expires: 1965-06-22
Abstract
No abstract record available.
Inventors
- 👤 Jurg A Senn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:59
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34; F; F16; F16J; F16J3/00; F16J3/02; F16J3/04; F16J3/047; G; G01; G01L; G01L7/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |