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Patent US2947092A successfully refreshed from Google Patents.
US2947092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational, recreational, and testing apparatus
Assignee: University of Tennessee Research Foundation
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Filing: 1957-06-20
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Granted: 1960-08-02
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Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 John B Sharp
- 👤 Arnold Icesy Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:23
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321292A
Cited
US971865A
Cited
US1729226A
Cited
US2049178A
Cited
US2213974A
Cited
US2317107A
Cited
US2499323A
Cited
US2564089A
Cited
US2690621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |