US3570303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for preparing prepreg glass roving for evaluation
Assignee: United States Department of the Navy
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Filing: 1968-05-06
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Granted: 1971-03-16
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Expires: 1988-05-06
Abstract
Abstract A TECHNIQUE FOR PREPARING PRIEMPREGNATED GLASS ROVING FOR EVALUATION, INCLUDING TENSIONING A SPECIMEN OF THE ROVING WITH ABOUT TWO POUNDS OF FORCE, HEATING THE TENSIONED SPECIMEN WITH A HEAT SOURCE TO ABOUT 100*C. IN SECONDS, AND COINCIDENTIALLY WITH THE HEATING, ILLUMINATING THE SPECIMEN AND OBSERVING THE ILLUMINATED SPECIMEN THROUGH AN OPTICAL MAGNIFIER FOR QUANTITY AND BEHAVIOR OF ENTRAINED GAS POCKETS.
Inventors
- 👤 Nathan Fried
- 👤 Julius Kaminetsky
- 👤 Maurice Silvergleit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:02
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803; G01N2021/8472
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |