US3929684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New adhesive tetrazole polymers and process of making therefor
Assignee: United States Department of the Army
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Filing: 1974-01-21
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Granted: 1975-12-30
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Expires: 1994-01-21
Abstract
Abstract New tetrazole polymers are formed from a self-polymerization condensation reaction effected by adding tetrazoles of the formula below to a solution containing an equivalent of base or slightly less than an equivalent and heating for about 5 days at temperatures of 50*-100*C: where Z is CH2CH2X or NHCOCH2, and where X is Br, Cl, or I. The polytetrazoles serve as binders in propellant systems and also supply added energy thereto.
Inventors
- 👤 Fred J Einberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:24
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
5 words
TETRAZOLE POLYMERS OF THE FORMULA
Claim 2
Dependent Claim
5 words
TETRAZOLE POLYMERS OF THE FORMULA
Claim 3
Dependent Claim
10 words
Tetrazole polymers according to claim 1 where X is Cl.
Claim 4
Dependent Claim
11 words
Process for forming tetrazole polymers comprising adding substances of the formula
Claim 5
Dependent Claim
11 words
Process for forming tetrazole polymers comprising adding substances of the formula
Claim 6
Dependent Claim
9 words
Process according to claim 3 where X is Cl.
Claim 7
Dependent Claim
16 words
Process according to claim 3 where the reaction medium is formed of sodium hydride of dimethylformamide.
Claim 8
Dependent Claim
17 words
Process according to claim 4 where the reaction medium is formed of potassium hydroxide in methyl alcohol.
Claim 9
Dependent Claim
15 words
Process according to claim 4 where the reaction medium is formed of triethylamine in dimethylformamide.
Claim 10
Dependent Claim
16 words
Process according to claim 4 where the reaction medium is formed of sodium hydroxide in water.
References Cited (Backward Citations)
US3386968A
Cited
US3468874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |