Patent US3797238A successfully refreshed from Google Patents.
US3797238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid hypergolic propellant systems
Assignee: RTX Corp
•
Filing: 1965-06-04
•
Granted: 1974-03-19
•
Expires: 1985-06-04
Abstract
Abstract Hypergolic solid oxidizer and fuel systems are provided whereby ignition and combustion of the separate solid fuel and oxidizer grains can be obtained by contacting of the respective grains. Suitable solid oxidizers include NOBrF4, LiClO4 . NOF, MgClO4 . 2NOF, NO2ClO4, NO2BF4, (NO2)3 (AlClO4)6, NO2AsF6, NO2SbF6, and NO2PF6. Suitable solid fuels include LiAlH4, LiBH4, Li2AlH5, BeH2, LiH2 . BeH2, tetramethylammonium hydrotriborate, triaminoguonidinium diazine, diaminotetrazine, 4-amino-3, 5dihydrazine-1,2,4-triazole, N2H4(BH3)2, Mu (hydrazino)decaborane, 3,6-dihydrazine-s-tetrazine, NH4N3, (CH3)4NB3H8 and borane complexes with ammonia such as B10H12 . 2NH3. Completely fluorinated polyethylene resin is a suitable binder for the oxidizer system.
Inventors
- 👤 B Iwanciow
- 👤 W Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:56
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/02; C06B47/10; C06B43/00; C06B47/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
The process of claim 1 wherein said oxidizer grain contains an ignition aid comprising an alkali metal hexafluorobromate.
Claim 2
Dependent Claim
23 words
The process of claim 1 wherein said oxidizer grain contains from 5 to 12 percent by weight of a totally fluorinated polyethylene resin.
Claim 3
Dependent Claim
18 words
A hypergolic solid oxidizer grain consisting essentially of 64% NO2ClO4, 27% CsBrF6 and 9 percent totally fluorinated polyethylene.
Claim 4
Dependent Claim
39 words
The process of claim 1 wherein said fuel grain comprises a material selected from the group consisting of metal hydrides, tetramethylammonium hydrotriborate, diaminotetrazine, 4-amino-3, 5-dihydrazino-1,2,4 triazole, N2H4(BH3)2, Mu -(Hydrazino) decaborane, 3,6-dihydrazino-s-tetrazine, NH4N3, triaminoguanidinium diazide, (CH3)4NB3H8 and B10H12 . 2NH3.
Claim 5
Dependent Claim
21 words
The process of claim 5 wherein the fuel grain contains up to 50 percent by weight of polyethylene as a binder.
Claim 6
Dependent Claim
134 words
In a method for producing thrust from a reaction motor which comprises providing a solid oxidizer grain and a solid fuel grain within said reaction motor, said oxidizer and said fuel being members of an acid base pair capable of generating sufficient energy from an acid base reaction to active an oxidation-reduction reaction between said oxidizer and fuel; placing said oxidizer and fuel grains in intimate contact within said reaction motor for sufficient time to initiate said oxidation-reduction reaction whereby gaseous combustion products are produced within said reaction motor and exhausting said gaseous combustion products from said reaction motor whereby a propulsive thrust is produced; the improvement wherein said oxidizer grain comprises a material selected from the group consisting of NOBrF4, LiClO4 . NOF, MgClO4 . 2NOF, NO2ClO4, (NO2)3 (AlClO4)6, NO2AsF6, NO2SbF6 and NO2PF6.
Claim 7
Dependent Claim
37 words
The method of claim 7 wherein said fuel grain comprises a material selected from the group consisting of metal hydride, tetramethylammonium hydrotriborate, diaminotetrazine, 4-amino-3, 5-dihydrazino-1,2,4-triazole, N2H4(BH3)2, Mu -(hydrazino)decaborane, 3,6-dihydrazino-s-tetrazine, NH4N3, triaminoguonidinium diazide, (CH3)4NB3H8 and B10H12 . 2NH3.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |