US2647393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relaxation test apparatus
Assignee: Individual
•
Filing: 1949-03-30
•
Granted: 1953-08-04
•
Expires: 1969-03-30
Abstract
No abstract record available.
Inventors
- 👤 William C Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:51
CPC Classifications
G; G01; G01M; G01M99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US758418A
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US1654495A
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US1878179A
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US1888755A
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US2154280A
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US2436317A
Cited
US2545482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |