Patent US2557463A successfully refreshed from Google Patents.
US2557463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellant composition and process of making same
Assignee: Imperial Chemical Industries Ltd
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Filing: 1947-07-31
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Granted: 1951-06-19
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Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Pring John Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:09
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/34; C06B23/00; C06B23/04; C06B25/36; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/111
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A PROPELLANT EXPLOSIVE COMPOSITION HAVING A CALORIFIC VALUE OF SUBSTANTIALLY FROM 650-850 CALORIES PER GRAMME, WATER GASEOUS, AND OF SUPPRESSED FLASH AND EROSIVE CHARACTERISTIC FOR USE WITH LARGE GUNS, COMPRISING SUBSTANTIALLY 50-65% NITROGUANIDINE, THE PARTICLES OF WHICH HAVE A SPECIFIC SURFACE OF AT LEAST 9,000 SQ. CM. PER C. C. DISPERSED IN 16-23% NITROECLLULOSE GELATINISED BY 0.8 TO 1.5 TIMES ITS WEIGHT OF A LIQUID EXPLOSIVE NITRIC ESTER, AND DIETHYL DIPHENYL UREA IN THE FORM OF A FINELY DIVIDED, HOMOGENEOUSLY DISTRIBUTED DOUBLE COMPOUND WITH NITROGUANIDINE.
Claim 2
Dependent Claim
85 words
A PROPELLANT EXPLOSIVE COMPOSITION HAVING A CALORIFIC VALUE OF SUBSTANTIALLY FROM 650-850 CALORIES PER GRAMME, WATER GASEOUS, AND OF SUPPRESSED FLASH AND EROSIVE CHARACTERISTIC FOR USE WITH LARGE GUNS, COMPRISING SUBSTANTIALLY 50-65% NITROGUANIDINE, THE PARTICLES OF WHICH HAVE A SPECIFIC SURFACE OF AT LEAST 9,000 SQ. CM. PER C. C. DISPERSED IN 16-23% NITROECLLULOSE GELATINISED BY 0.8 TO 1.5 TIMES ITS WEIGHT OF A LIQUID EXPLOSIVE NITRIC ESTER, AND DIETHYL DIPHENYL UREA IN THE FORM OF A FINELY DIVIDED, HOMOGENEOUSLY DISTRIBUTED DOUBLE COMPOUND WITH NITROGUANIDINE.
Claim 3
Independent Claim
132 words
A METHOD FOR THE MANUFACTURE OF PROPELLANT EXPLOSIVE COMPOSITIONS HAVING A CALORIFIC VALUE OF SUBSTANTIALLY 650-850 CALORIES PER GRAMME WATER GASEOUS AND OF SUPPRESSED FLASH AND EROSIVE CHARACTERISTICS FOR USE WITH LARGE GUNS, COMPRISING FIRST THOROUGHLY DISPERSING 50-65% NITROGUANIDINE, THE PARTICLES OF WHICH HAVE A SPECIFIC SURFACE OF AT LEAST 9,000 SQUARE CENTIMETERS PER C. C. IN 16-23% NITROCELLULOSE GELATINISED WITH 0.8-1.5 TIMES ITS WEIGHT OF A LIQUID EXPLOSIVE NITRIC ESTER, AND THEREAFTER STABILIZING THE COMPOSITION WITH DIETHYL DIPHENYL UREA ADDED ONLY AFTER MIXING THE NITROGUANIDINE AND NITROCELLULOSE-LIQUID EXPLOSIVE NITRIC ESTER THOROUGHLY FOR SUBSTANTIALLY FIFTEEN TO THIRTY MINUTES, THE WITHHOLDING OF THE ADDITION OF THE DIETHYL DIPHENYL UREA RESULTING IN HOMOGENEOUS DISTRIBUTION, THROUGHOUT THE COMPOSITION, OF A FINELY DIVIDED DOUBLE COMPOUND FORMED BY INTERACTION OF THE NITROGUANIDINE AND THE DIETHYL DIPHENYL UREA.
Claim 4
Independent Claim
132 words
A METHOD FOR THE MANUFACTURE OF PROPELLANT EXPLOSIVE COMPOSITIONS HAVING A CALORIFIC VALUE OF SUBSTANTIALLY 650-850 CALORIES PER GRAMME WATER GASEOUS AND OF SUPPRESSED FLASH AND EROSIVE CHARACTERISTICS FOR USE WITH LARGE GUNS, COMPRISING FIRST THOROUGHLY DISPERSING 50-65% NITROGUANIDINE, THE PARTICLES OF WHICH HAVE A SPECIFIC SURFACE OF AT LEAST 9,000 SQUARE CENTIMETERS PER C. C. IN 16-23% NITROCELLULOSE GELATINISED WITH 0.8-1.5 TIMES ITS WEIGHT OF A LIQUID EXPLOSIVE NITRIC ESTER, AND THEREAFTER STABILIZING THE COMPOSITION WITH DIETHYL DIPHENYL UREA ADDED ONLY AFTER MIXING THE NITROGUANIDINE AND NITROCELLULOSE-LIQUID EXPLOSIVE NITRIC ESTER THOROUGHLY FOR SUBSTANTIALLY FIFTEEN TO THIRTY MINUTES, THE WITHHOLDING OF THE ADDITION OF THE DIETHYL DIPHENYL UREA RESULTING IN HOMOGENEOUS DISTRIBUTION, THROUGHOUT THE COMPOSITION, OF A FINELY DIVIDED DOUBLE COMPOUND FORMED BY INTERACTION OF THE NITROGUANIDINE AND THE DIETHYL DIPHENYL UREA.
References Cited (Backward Citations)
GB189311645A
Cited
US1454414A
Cited
US1808613A
Cited
GB322427A
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US2003914A
Cited
US2210104A
Cited
US2210105A
Cited
US2379056A
Cited
US2425854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |