US3696616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-carbon forming monopropellant process using a lower alkylhydrazine and ammonia
Assignee: Aerojet Rocketdyne Inc
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Filing: 1967-10-05
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Granted: 1972-10-10
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Expires: 1987-10-05
Abstract
Abstract A monopropellant comprised of an alkyl hydrazine containing either ammonia or hydrazine, or both additives in an amount sufficient to prevent the formation of solid carbon as a combustion product from the decomposition of the basic material.
Inventors
- 👤 James M Lucas
- 👤 Jack K Suder
- 👤 Eugene M Vander Wall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:02
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/02; C06B47/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
20 words
The composition of claim 1 wherein said alkylhydrazine is selected from the class consisting of monomethyl hydrazine and ethylene dihydrazine.
Claim 2
Dependent Claim
34 words
The composition of claim 1 including hydrazine present in an amount up to 60 weight percent of the composition, said hydrazine contributing to the prevention of carbonaceous deposits upon combustion of the monopropellant composition.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the ammonia is present in an amount of 3 to 16 weight percent of the composition.
Claim 4
Dependent Claim
20 words
The method of claim 4 wherein said alkylhydrazine is selected from the class consisting of monomethyl hydrazine and ethylene dihydrazine.
Claim 5
Independent Claim
60 words
A method of producing thrust in a reaction motor without formation of carbonaceous deposits comprising: providing a monopropellant composition made up of a lower alkylhydrazine, and ammonia with the ammonia present in an amount up to 16 weight percent sufficient to prevent formation of carbonaceous deposits upon combustion of the monopropellant composition, and burning said composition in a reaction motor.
Claim 6
Dependent Claim
32 words
The method of claim 6 wherein the monopropellant composition includes hydrazine present in an amount up to 60 weight percent of the composition, said hydrazine contributing to the prevention of carbonaceous deposits.
Claim 7
Dependent Claim
24 words
A method in accordance with claim 6 wherein the ammonia is present in an amount of 3 to 16 weight percent of the composition.
Claim 8
Dependent Claim
100 words
A monopropellant composition comprising: an alkylhydrazine selected from the class consisting of monomethylhydrazine and ethylenedihydrazine, ammonia, hydrazine, said ammonia and hydrazine being present in a combined amount sufficient to prevent the formation of carbonaceous deposits upon the combustion of said alkylhydrazine, the ammonia can vary up to 16 weight percent of the composition, while the hydrazine can vary up to 60 weight percent of the composition, wherein as the amount of hydrazine increases, the amount of ammonia required to prevent the formation of carbonaceous deposits decreases, and wherein as the amount of ammonia increases the required amount of hydrazine decreases.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |