Patent US3794535A successfully refreshed from Google Patents.
US3794535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrotechnic lacquer
Assignee: Societe Nationale des Poudres et Explosifs
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Filing: 1972-07-14
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Granted: 1974-02-26
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Expires: 1992-07-14
Abstract
Abstract LACQUERS COMPRISING A DISPERSION OF A PYROTECHNIC COMPOSITION IN A COLLODION, WHICH ARE USEFUL IN FORMING IGNITION COATINGS ON BLOCKS OF PROPELLANT AND GAS GENERATORS, THE PYROTECHNIC COMPOSITIONS MAY BE ALUMINO-THERMAL POWDERS, THERMITES, BLACK POWDERS OR ZIRCONIUM/BARIUM CHROMATE/AMMONIUM PERCHLORATE/AMMONIUM BICHROMATE, AND THE COLLODION MAY BE A NITROCELLULOSE OR NITROGLYCERINE POWDERS (OR MIXTURES OF THE TWO), OR A PLASTICS MATERIAL, IN SOLUTION IN SOLVENT.
Inventors
- 👤 Y Bertrand
- 👤 R Grebert
- 👤 J Paquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
C; C06; C06C; C06C7/00; C06C7/02; C06B; C06B25/00; C06B25/18; C06B25/24; C06B25/26; C06B33/00; C06B33/12; C06B45/00; C06B45/12
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |