US2990263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing rocket propellants
Assignee: Individual
•
Filing: 1949-02-03
•
Granted: 1961-06-27
•
Expires: 1969-02-03
Abstract
No abstract record available.
Inventors
- 👤 William H Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:40
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0008; C06B21/0025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR MAKING A PROPELLANT GRAIN OF THE COMPOSITE TYPE INCLUDING THE STEPS OF MIXING ABOUT 70% OF AMMONIUM PERCHLORATE AND ABOUT 30% OF A RESINOUS BINDER SELECTED FROM THE GROUP CONSISTING OF CELLULOSE NITRATE AND POLYVINYL NITRATE AND INCLUDING A PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF 2,2-DINITRO PROPANE AND TRIACETIN, CURING THE MIXTURE IN THE PRESENCE OF HEAT, COMMINUTING THE CURED MIXTURE TO PROVIDE PARTICLES OF SUITABLE SIZE, INTRODUCING THE PARTICLES INTO A MOLD, AND ADDING 2,2-DINITRO PROPANE TO THE PARTICLES IN THE MOLD.
Claim 2
Dependent Claim
87 words
A PROCESS FOR MAKING A PROPELLANT GRAIN OF THE COMPOSITE TYPE INCLUDING THE STEPS OF MIXING ABOUT 70% OF AMMONIUM PERCHLORATE AND ABOUT 30% OF A RESINOUS BINDER SELECTED FROM THE GROUP CONSISTING OF CELLULOSE NITRATE AND POLYVINYL NITRATE AND INCLUDING A PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF 2,2-DINITRO PROPANE AND TRIACETIN, CURING THE MIXTURE IN THE PRESENCE OF HEAT, COMMINUTING THE CURED MIXTURE TO PROVIDE PARTICLES OF SUITABLE SIZE, INTRODUCING THE PARTICLES INTO A MOLD, AND ADDING 2,2-DINITRO PROPANE TO THE PARTICLES IN THE MOLD.
References Cited (Backward Citations)
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Cited
US2056794A
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |