US3883378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable nitrostarch
Assignee: United States Department of the Army
•
Filing: 1966-11-23
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Granted: 1975-05-13
•
Expires: 1986-11-23
Abstract
Abstract 1. A urethane complex consisting of the reaction product of nitrostarch and an isocyanate selected from the group consisting of 2,4-TOLYLENE DIISOCYANATE, 4,4''-DIPHENYLMETHANE DIISOCYANATE, 1,5-NAPTHALENE DIISOCYANATE, P-TOLYLENE ISOCYANATE, 3,3''-DIMETHOXY-4,4''-BIPHENYL DIISOCYANATE, 3,3''-DIMETHYL-4,4''-BIPHENYL DIISOCYANATE, PHENYLENE DIISOCYANATE HEXAMETHYLENE DIISOCYANATE, AND HEPTAMETHYLENE DIISOCYANATE, SAID COMPLEX HAVING THERMAL STABILITY ABOVE 65*C for use in munitions.
Inventors
- 👤 Joseph S Stack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:34
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C08; C08B; C08B31/00; C08B31/003; C08B31/006
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
53 words
A URETHANE COMPLEX CONSISTING OF THE REACTION PRODUCT OF NNITROSTARCHH AND AN ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF 2,4-TOLYLENE DIISOCYANATE, 4,4''-DIPHENYLMETHANE DIISOCYANATE, 1,5-NAPTHALENE DIISOCYANATE, P-TOLYLENE ISOCYANATE, 3,3''-DIMETHOXY - 4,4''-BIPHENYL DIISOCYANATE, 3,3''-DIMETHY - 4,4''-BIPHENYL DIISOCYANATE, PHENYLENE DIISOCYANATE HEXAMETHYLENE DIISOCYANATE, AND HEPTAMETHYLENE DIISOCYANATE, SAID COMPLEX HAVING THERMAL STABILITY ABBOVE 65*C FOR USE IN MUNITIONS.
Claim 2
Dependent Claim
53 words
A URETHANE COMPLEX CONSISTING OF THE REACTION PRODUCT OF NNITROSTARCHH AND AN ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF 2,4-TOLYLENE DIISOCYANATE, 4,4''-DIPHENYLMETHANE DIISOCYANATE, 1,5-NAPTHALENE DIISOCYANATE, P-TOLYLENE ISOCYANATE, 3,3''-DIMETHOXY - 4,4''-BIPHENYL DIISOCYANATE, 3,3''-DIMETHY - 4,4''-BIPHENYL DIISOCYANATE, PHENYLENE DIISOCYANATE HEXAMETHYLENE DIISOCYANATE, AND HEPTAMETHYLENE DIISOCYANATE, SAID COMPLEX HAVING THERMAL STABILITY ABBOVE 65*C FOR USE IN MUNITIONS.
Claim 3
Dependent Claim
28 words
The complex of claim 1 wherein said isocyanate is present in an amount between about 1 and 15 percent by weight based on the weight of said nitrostarch.
Claim 4
Dependent Claim
27 words
The complex of claim 1 wherein said isocyanate is present in an amount between 4 and 8 percent by weight based on the weight of said nitrostarch.
Claim 5
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and 2,4-tolylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 6
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and 2,4-tolylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 7
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and 4,4''-diphenylmethane diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 8
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and 4,4''-diphenylmethane diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 9
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and 1,5-napthalene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 10
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and 1,5-napthalene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 11
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and p-tolylene isocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 12
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and p-tolylene isocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 13
Dependent Claim
26 words
A urethane complex consisting of the reaction product of nitrostarch and 3,3''-dimethoxy - 4,4''-biphenyl diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 14
Dependent Claim
26 words
A urethane complex consisting of the reaction product of nitrostarch and 3,3''-dimethoxy - 4,4''-biphenyl diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 15
Dependent Claim
26 words
A urethane complex consisting of the reaction product of nitrostarch and 3,3''-dimethyl - 4,4''-biphenyl diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 16
Dependent Claim
26 words
A urethane complex consisting of the reaction product of nitrostarch and 3,3''-dimethyl - 4,4''-biphenyl diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 17
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and phenylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 18
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and phenylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 19
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and hexamethylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 20
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and hexamethylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 21
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and heptamethylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
Claim 22
Dependent Claim
24 words
A urethane complex consisting of the reaction product of nitrostarch and heptamethylene diisocyanate, said complex having thermal stability above 65*C for use in munitions.
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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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |