US3907619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution cast double base propellants and method
Assignee: United States Department of the Navy
•
Filing: 1964-01-30
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Granted: 1975-09-23
•
Expires: 1984-01-30
Abstract
Abstract 1. A method for the preparation of a double base propellant grain which comprises the steps of 1. PRETREATING NITROCELLULOSE BY A. STIRRING 100 GRAMS OF DRY NITROCELLULOSE INTO A SOLUTION OF 2 GRAMS OF PHENYL ISOCYANATE IN 500 GRAMS OF CARBON TETRACHLORIDE, B. FILTERING THE RESULTING MIXTURE AND C. DRYING THE RESIDUE; 2. ROTATIONALLY STIRRING 15 PARTS BY WEIGHT OF THE PRETREATED NITROCELLULOSE WITH 3 PARTS RED LEAD, 1 PART NITRODIPHENYLAMINE, 57.1 PARTS BY WEIGHT NITROGLYCERIN AND 23.6 PARTS BY WEIGHT TRIACETIN UNTIL A VISCOUS MIXTURE RESULTS, 3. ADDING TO THIS MIXTURE TOLYLENE DIISOCYANATE, 4. TRANSFERRING THE RESULTING MIXTURE UNDER REDUCED PRESSURE TO A CONTAINER AND, 5. CURING FOR 5 DAYS AT 50* C.
Inventors
- 👤 Donald E Elrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:16
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0058; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 68
Claim 1
Independent Claim
16 words
A METHOD FOR THE PREPARATION OF A DOUBLE BASE PROPELLANT GRAIN WHICH COMPRISES THE STEPS OF
Claim 2
Independent Claim
16 words
A METHOD FOR THE PREPARATION OF A DOUBLE BASE PROPELLANT GRAIN WHICH COMPRISES THE STEPS OF
Claim 3
Dependent Claim
35 words
PRETREATING NITROCELLULOSE BY A. STIRRING 100 GRAMS OF DRY NITROCELLULOSE INTO A SOLUTION OF 2 GRAMS OF PHENYL ISOCYANATE IN 500 GRAMS OF CARBON TETRACHLORIDE, B. FILTERING THE RESULTING MIXTURE AND C. DRYING THE RESIDUE,
Claim 4
Dependent Claim
35 words
PRETREATING NITROCELLULOSE BY A. STIRRING 100 GRAMS OF DRY NITROCELLULOSE INTO A SOLUTION OF 2 GRAMS OF PHENYL ISOCYANATE IN 500 GRAMS OF CARBON TETRACHLORIDE, B. FILTERING THE RESULTING MIXTURE AND C. DRYING THE RESIDUE,
Claim 5
Dependent Claim
34 words
ROTATIONALLY STIRRING 15 PARTS BY WEIGHT OF THE PRETREATED NITROCELLULOSE WITH 3 PARTS RED LEAD, 1 PART NITRODIPHENYLAMINE, 57.1 PARTS BY WEIGHT NITROGLYCERIN AND 23.6 PARTS BY WEIGHT TRIACETIN UNTIL A VISCOUS MIXTURE RESULTS,
Claim 6
Dependent Claim
34 words
ROTATIONALLY STIRRING 15 PARTS BY WEIGHT OF THE PRETREATED NITROCELLULOSE WITH 3 PARTS RED LEAD, 1 PART NITRODIPHENYLAMINE, 57.1 PARTS BY WEIGHT NITROGLYCERIN AND 23.6 PARTS BY WEIGHT TRIACETIN UNTIL A VISCOUS MIXTURE RESULTS,
Claim 7
Dependent Claim
34 words
stirring the pretreated nitrocellulose and modifier mixture in a solution of methylene chloride and a casting solvent consisting essentially of an explosive plasticizer, a non-explosive plasticizer and a stabilizer until a slurry is formed,
Claim 8
Dependent Claim
34 words
stirring the pretreated nitrocellulose and modifier mixture in a solution of methylene chloride and a casting solvent consisting essentially of an explosive plasticizer, a non-explosive plasticizer and a stabilizer until a slurry is formed,
Claim 9
Dependent Claim
34 words
rotationally stirring 15 parts by weight of the pretreated nitrocellulose with 3 parts red lead, 1 part nitrodiphenylamine, 57.1 parts by weight nitroglycerin and 23.6 parts by weight triacetin until a viscous mixture results,
Claim 10
Dependent Claim
34 words
rotationally stirring 15 parts by weight of the pretreated nitrocellulose with 3 parts red lead, 1 part nitrodiphenylamine, 57.1 parts by weight nitroglycerin and 23.6 parts by weight triacetin until a viscous mixture results,
Claim 11
Independent Claim
16 words
A method for the preparation of a double base propellant grain which comprises the steps of
Claim 12
Independent Claim
16 words
A method for the preparation of a double base propellant grain which comprises the steps of
Claim 13
Dependent Claim
9 words
adding while stirring 0.3 parts by weight phenyl isocyanate,
Claim 14
Dependent Claim
9 words
adding while stirring 0.3 parts by weight phenyl isocyanate,
Claim 15
Dependent Claim
52 words
stirring 13.6 parts by weight of said pellets with 83.2 parts by weight of a casting solvent consisting of a. 99% nitroglycerin and b. 1% ethyl Centralite 2.7 parts by weight dibasic lead phthalate 0.3 parts by weight carbon black 0.2 parts by weight nitrodiphenylamine until a viscous mixture results, while stirring
Claim 16
Dependent Claim
52 words
stirring 13.6 parts by weight of said pellets with 83.2 parts by weight of a casting solvent consisting of a. 99% nitroglycerin and b. 1% ethyl Centralite 2.7 parts by weight dibasic lead phthalate 0.3 parts by weight carbon black 0.2 parts by weight nitrodiphenylamine until a viscous mixture results, while stirring
Claim 17
Dependent Claim
7 words
removing excess phenyl isocyanate under reduced pessure,
Claim 18
Dependent Claim
7 words
removing excess phenyl isocyanate under reduced pessure,
Claim 19
Independent Claim
14 words
A method for the preparation of a propellant grain which comprises the steps of
Claim 20
Independent Claim
14 words
A method for the preparation of a propellant grain which comprises the steps of
Claim 21
Dependent Claim
7 words
adding while stirring 0.25 parts phenyl isocyanate,
Claim 22
Dependent Claim
7 words
adding while stirring 0.25 parts phenyl isocyanate,
Claim 23
Dependent Claim
6 words
adding to this mixture tolylene diisocyanate,
Claim 24
Dependent Claim
6 words
adding to this mixture tolylene diisocyanate,
Claim 25
Dependent Claim
15 words
removing methylene chloride from the slurry as stirring continues and as nitrocellulose goes into solution,
Claim 26
Dependent Claim
15 words
removing methylene chloride from the slurry as stirring continues and as nitrocellulose goes into solution,
Claim 27
Dependent Claim
6 words
ADDING TO THIS MIXTURE TOLYLENE DIISOCYANATE,
Claim 28
Dependent Claim
6 words
ADDING TO THIS MIXTURE TOLYLENE DIISOCYANATE,
Claim 29
Dependent Claim
11 words
TRANSFERRING THE RESULTING MIXTURE UNDER REDUCE PRESSURE TO A CONTAINER AND,
Claim 30
Dependent Claim
11 words
TRANSFERRING THE RESULTING MIXTURE UNDER REDUCE PRESSURE TO A CONTAINER AND,
Claim 31
Dependent Claim
6 words
adding tolylene diisocyanate to the slurry,
Claim 32
Dependent Claim
6 words
adding tolylene diisocyanate to the slurry,
Claim 33
Dependent Claim
11 words
transferring the resulting mixture under reduced pressure to a container and,
Claim 34
Dependent Claim
11 words
transferring the resulting mixture under reduced pressure to a container and,
Claim 35
Dependent Claim
6 words
removing under reduced pressure excess isocyanate
Claim 36
Dependent Claim
6 words
removing under reduced pressure excess isocyanate
Claim 37
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 38
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 39
Dependent Claim
7 words
adding 0.4 parts by weight tolylene diisocyanate,
Claim 40
Dependent Claim
7 words
adding 0.4 parts by weight tolylene diisocyanate,
Claim 41
Dependent Claim
8 words
transferring the resulting mixture to a container and
Claim 42
Dependent Claim
8 words
transferring the resulting mixture to a container and
Claim 43
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 44
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 45
Dependent Claim
5 words
adding 0.3 parts tolylene diisocyanate,
Claim 46
Dependent Claim
5 words
adding 0.3 parts tolylene diisocyanate,
Claim 47
Dependent Claim
6 words
curing for 5 days at 50*C.
Claim 48
Dependent Claim
6 words
curing for 5 days at 50*C.
Claim 49
Dependent Claim
10 words
transferring the slurry under reduced pressure to a container, and
Claim 50
Dependent Claim
10 words
transferring the slurry under reduced pressure to a container, and
Claim 51
Dependent Claim
6 words
CURING FOR 5 DAYS AT 50*C.
Claim 52
Dependent Claim
6 words
CURING FOR 5 DAYS AT 50*C.
Claim 53
Dependent Claim
10 words
curing for from 4 to 7 days at about 50*C.
Claim 54
Dependent Claim
10 words
curing for from 4 to 7 days at about 50*C.
Claim 55
Dependent Claim
9 words
pouring the resulting mixture into a rocket motor, and
Claim 56
Dependent Claim
9 words
pouring the resulting mixture into a rocket motor, and
Claim 57
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 58
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 59
Dependent Claim
11 words
curing for three days at 50*C.; all percentages being by weight.
Claim 60
Dependent Claim
11 words
curing for three days at 50*C.; all percentages being by weight.
Claim 61
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 62
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 63
Dependent Claim
6 words
curing for three days at 50*C.
Claim 64
Dependent Claim
6 words
curing for three days at 50*C.
Claim 65
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 66
Dependent Claim
6 words
A propellant composition consisting essentially of
Claim 67
Independent Claim
16 words
A method for the preparation of a double base propellant grain which comprises the steps of
Claim 68
Independent Claim
16 words
A method for the preparation of a double base propellant grain which comprises the steps of
References Cited (Backward Citations)
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US2967098A
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US3033715A
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US2916778A
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US3106498A
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US3002830A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |