US2960389A
Expired / Lapsed
US
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Method of testing propellant stability
Assignee: Individual
•
Filing: 1959-01-02
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Granted: 1960-11-15
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Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Zihlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:00
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/22; G01N33/227; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/177692; Y10T436/178459
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE METHOD OF CONTINUOUSLY TESTING THE STABILITY OF NITROCELLULOSE CONTAINING PROPELLANTS BY DETECTING THE PRESENCE OF NITROGEN DIOXIDE GAS WHICH INCLUDES THE STEPS OF IMPREGNATING PAPER WITH TETRAETHYL-DIAMINO-TRIPHENYLCARBHYDRIDE SULFATE WHEREBY THE PAPER IS DYED GREEN, PLACING THE IMPREGNATED PAPER IN CLOSE PROXIMITY TO THE PROPELLANT TO BE TESTED, AND LEAVING THE PAPER IN CLOSE PROXIMITY TO THE PROPELLANT UNTIL THE GREEN COLOR BEGINS TO FADE.
Claim 2
Independent Claim
65 words
THE METHOD OF CONTINUOUSLY TESTING THE STABILITY OF NITROCELLULOSE CONTAINING PROPELLANTS BY DETECTING THE PRESENCE OF NITROGEN DIOXIDE GAS WHICH INCLUDES THE STEPS OF IMPREGNATING PAPER WITH TETRAETHYL-DIAMINO-TRIPHENYLCARBHYDRIDE SULFATE WHEREBY THE PAPER IS DYED GREEN, PLACING THE IMPREGNATED PAPER IN CLOSE PROXIMITY TO THE PROPELLANT TO BE TESTED, AND LEAVING THE PAPER IN CLOSE PROXIMITY TO THE PROPELLANT UNTIL THE GREEN COLOR BEGINS TO FADE.
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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |