Patent US2742672A successfully refreshed from Google Patents.
US2742672A
Expired / Lapsed
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Process for preparing composite propellants
Assignee: Individual
•
Filing: 1944-08-23
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Granted: 1956-04-24
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Expires: 1964-08-23
Abstract
No abstract record available.
Inventors
- 👤 Charles A Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:59
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE PROCESS OF PRODUCING A PROPELLANT FOR JET ACTUATED DEVICES WHICH COMPRISES THE FOLLOWING STEPS: (A) INTIMATELY MIXING FINELY DIVIDED SODIUM NITRATE AND FINELY DIVIDED AMMONIUM PICRATE IN A RATIO OF ABOUT 1:1 BY WEIGHT, (B) INTIMATELY MIXING WITH THE MIXTURE FORMED IN STEP (A) A LIQUID THERMOSETING SYNTHETIC RESIN HAVING A VISCOSITY OF FROM ABOUT 500 TO ABOUT 10,000 CENTIPOISES AT 25* C. AND IN SUCH AMOUNT THAT THE PROPELLANT WILL CONTAIN ABOUT 5 TO 10 PER CENT BY WEIGHT OF RESIN, (C) COLD MOLDING UNDER PRESSURE THE MIXTURE FORMED IN STEP (B), AND (D) CURING THE COLD MOLDED MIXTURE AT A TEMPERATURE BELOW 80* C.
Claim 2
Dependent Claim
107 words
THE PROCESS OF PRODUCING A PROPELLANT FOR JET ACTUATED DEVICES WHICH COMPRISES THE FOLLOWING STEPS: (A) INTIMATELY MIXING FINELY DIVIDED SODIUM NITRATE AND FINELY DIVIDED AMMONIUM PICRATE IN A RATIO OF ABOUT 1:1 BY WEIGHT, (B) INTIMATELY MIXING WITH THE MIXTURE FORMED IN STEP (A) A LIQUID THERMOSETING SYNTHETIC RESIN HAVING A VISCOSITY OF FROM ABOUT 500 TO ABOUT 10,000 CENTIPOISES AT 25* C. AND IN SUCH AMOUNT THAT THE PROPELLANT WILL CONTAIN ABOUT 5 TO 10 PER CENT BY WEIGHT OF RESIN, (C) COLD MOLDING UNDER PRESSURE THE MIXTURE FORMED IN STEP (B), AND (D) CURING THE COLD MOLDED MIXTURE AT A TEMPERATURE BELOW 80* C.
References Cited (Backward Citations)
US141585A
Cited
GB189909062A
Cited
US678360A
Cited
US1700085A
Cited
US1808613A
Cited
US2004436A
Cited
US2434872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |