US2774239A
Expired / Lapsed
US
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Apparatus for determining dynamic mechanical properties of viscoelastic materials
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1952-07-26
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Granted: 1956-12-18
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Expires: 1972-07-26
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/32; G01N3/38; G01N11/00; G01N11/10; G01N2203/00; G01N2203/0058; G01N2203/0092; G01N2203/0094
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |