US5501823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of anhydrous tetrazole gas generant compositions
Assignee: Northrop Grumman Innovation Systems LLC
•
Filing: 1993-12-03
•
Granted: 1996-03-26
•
Expires: 2013-12-03
Abstract
Abstract A solid composition for generating nitrogen containing gas is provided. The composition includes an oxidizer and a non-azide fuel selected from anhydrous tetrazoles, derivatives, salts, complexes, and mixtures thereof. Preferred tetrazoles include 5-aminotetrazole and bis-(1(2)H-tetrazol-5-yl)-amine, a metal salt, a salt with a nonmetallic cation of a high nitrogen content base or a complex thereof. The salts and complexes are generally metal salts and complexes. The metal can be a transition metal. Metals that have been found to be particularly useful include copper, boron, cobalt, zinc, potassium, sodium, and strontium. The oxidizer is generally a metal oxide or a metal hydroxide. The composition can include certain other components such as secondary oxidizers, burn rate modifiers, slag formers, and binders.
Inventors
- 👤 Gary K. Lund
- 👤 Reed J. Blau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:41
CPC Classifications
C; C06; C06D; C06D5/00; C06D5/06; C06B; C06B21/00; C06B21/0033; C06B21/0066; C06B43/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
56 words
A method for preparing a gas generating composition comprising the steps of: a) pressing a quantity of gas generating material into pellets, said gas generating material comprising an oxidizer and a hydrated fuel, said fuel selected from the group consisting of tetrazoles; and b) drying said pellets until the hydrated fuel is converted to anhydrous form.
Claim 2
Independent Claim
56 words
A method for preparing a gas generating composition comprising the steps of: a) pressing a quantity of gas generating material into pellets, said gas generating material comprising an oxidizer and a hydrated fuel, said fuel selected from the group consisting of tetrazoles; and b) drying said pellets until the hydrated fuel is converted to anhydrous form.
Claim 3
Dependent Claim
31 words
A method for producing a gas generating composition as defined in claim 1 further comprising the step of protecting the gas generating material, including said anhydrous fuel, from exposure to water.
Claim 4
Dependent Claim
34 words
A method for producing a gas generating composition as defined in claim 1 wherein said tetrazole is selected from the group consisting of 5-aminotetrazol, a salt thereof, a complex thereof, and a mixture thereof.
Claim 5
Dependent Claim
36 words
A method for producing a gas generating composition as defined in claim 1 wherein said gas generating composition is selected from the group consisting of bis-(1(2)H-tetrazol-5-yl)amine, a salt thereof, a complex thereof, and a mixture thereof.
Claim 6
Dependent Claim
30 words
A method for producing a gas generating composition as defined in claim 1 wherein said oxidizer is selected from the group consisting of a metal oxide and a metal hydroxide.
Claim 7
Dependent Claim
31 words
A method for producing a gas generating composition as defined in claim 5 wherein said metal oxide or said metal hydroxide is a transition metal oxide or a transition metal hydroxide.
Claim 8
Dependent Claim
36 words
A method for producing a gas generating composition as defined in claim 1 wherein said oxidizer is an oxide or hydroxide of a metal selected from the group consisting of copper, molybdenum, bismuth, cobalt and iron.
Claim 9
Dependent Claim
50 words
A method for producing a gas generating composition as defined in claim 1 wherein said fuel is present in an amount ranging from about 10 to about 50 percent by weight, and said oxidizer is present in an amount ranging from about 90 percent to about 50 percent by weight.
Claim 10
Dependent Claim
29 words
A method for producing a gas generating composition as defined in claim 1 wherein said salt or complex of the tetrazole is a transition metal salt or complex thereof.
Claim 11
Dependent Claim
41 words
A method for producing a gas generating composition as defined in claim 1 wherein said tetrazole is a tetrazole salt or complex of a metal selected from the group consisting of iron, boron, copper, cobalt, zinc, potassium, sodium, strontium, and titanium.
Claim 12
Dependent Claim
24 words
A method for producing a gas generating composition as defined in claim 1 wherein said gas generating composition also includes a burn rate modifier.
Claim 13
Dependent Claim
22 words
A method for producing a gas generating composition as defined in claim 1 wherein said gas generating composition also includes a binder.
Claim 14
Dependent Claim
24 words
A method for producing a gas generating composition as defined in claim 1 wherein said gas generating composition also includes a slag forming agent.
Claim 15
Independent Claim
88 words
A method for producing a gas generating composition comprising the steps of: a) obtaining a quantity of gas generating material, said gas generating material comprising an oxidizer and a hydrated fuel, said fuel selected from the group consisting of tetrazoles; b) preparing a slurry of said gas generating material in water; c) drying said slurried material to a constant weight; d) pressing said material into pellets while said fuel is in a hydrated form; and e) drying said pellets until the gas generating material is in anhydrous form.
Claim 16
Independent Claim
88 words
A method for producing a gas generating composition comprising the steps of: a) obtaining a quantity of gas generating material, said gas generating material comprising an oxidizer and a hydrated fuel, said fuel selected from the group consisting of tetrazoles; b) preparing a slurry of said gas generating material in water; c) drying said slurried material to a constant weight; d) pressing said material into pellets while said fuel is in a hydrated form; and e) drying said pellets until the gas generating material is in anhydrous form.
Claim 17
Dependent Claim
38 words
A method for producing a gas generating composition as defined in claim 14 wherein said slurry comprises from about 3% to about 40% by weight water and from about 60% to about 97% by weight gas generating material.
Claim 18
Dependent Claim
31 words
A method for producing a gas generating composition as defined in claim 14 wherein the drying of the slurry in step (d) takes place at a temperature below approximately 110° F.
Claim 19
Dependent Claim
34 words
A method for producing a gas generating composition as defined in claim 14 wherein said tetrazole is selected from the group consisting of 5-aminotetrazol, a salt thereof, a complex thereof, and a mixture thereof.
Claim 20
Dependent Claim
36 words
A method for producing a gas generating composition as defined in claim 14 wherein said gas generating composition is selected from the group consisting of bis-(1(2)H-tetrazol-5-yl)amine, a salt thereof, a complex thereof, and a mixture thereof.
Claim 21
Dependent Claim
30 words
A method for producing a gas generating composition as defined in claim 14 wherein said oxidizer is selected from the group consisting of a metal oxide and a metal hydroxide.
Claim 22
Dependent Claim
31 words
A method for producing a gas generating composition as defined in claim 19 wherein said metal oxide or said metal hydroxide is a transition metal oxide or a transition metal hydroxide.
Claim 23
Dependent Claim
36 words
A method for producing a gas generating composition as defined in claim 14 wherein said oxidizer is an oxide or hydroxide of a metal selected from the group consisting of copper, molybdenum, bismuth, cobalt and iron.
Claim 24
Dependent Claim
50 words
A method for producing a gas generating composition as defined in claim 14 wherein said fuel is present in an amount ranging from about 10 to about 50 percent by weight, and said oxidizer is present in an amount ranging from about 90 percent to about 50 percent by weight.
References Cited (Backward Citations)
US2981616A
Cited
US3122462A
Cited
US3933543A
Cited
US3468730A
Cited
US3739574A
Cited
US3719604A
Cited
US3833432A
Cited
US3898112A
Cited
US3674059A
Cited
US3787074A
Cited
US3778084A
Cited
US3862866A
Cited
US3773351A
Cited
US4157648A
Cited
US3779823A
Cited
US3775182A
Cited
US3964255A
Cited
US3773352A
Cited
US3833029A
Cited
US3806461A
Cited
US3895098A
Cited
US3880595A
Cited
US3785149A
Cited
US3902934A
Cited
US3883373A
Cited
US3947300A
Cited
US3868124A
Cited
US3773947A
Cited
US3912561A
Cited
US3791302A
Cited
US3912458A
Cited
US3880447A
Cited
US3936330A
Cited
US3931040A
Cited
US3912562A
Cited
US3971729A
Cited
US3996079A
Cited
US3897235A
Cited
US4062708A
Cited
US3934984A
Cited
US4021275A
Cited
US4200615A
Cited
US4142029A
Cited
US4114591A
Cited
US4152891A
Cited
US4128996A
Cited
US4214438A
Cited
US4306499A
Cited
US4244758A
Cited
US4238253A
Cited
US4339288A
Cited
US4203786A
Cited
US4179327A
Cited
US4246051A
Cited
US4203787A
Cited
US4298412A
Cited
US4407119A
Cited
US4533416A
Cited
US4390380A
Cited
US4376002A
Cited
US4424086A
Cited
US4370930A
Cited
US4414902A
Cited
US4370181A
Cited
US4369079A
Cited
US4590860A
Cited
US4547342A
Cited
US4547235A
Cited
US4578247A
Cited
US4608102A
Cited
US4604151A
Cited
US4664033A
Cited
US4699400A
Cited
US4798142B1
Cited
US4798142A
Cited
US5024160A
Cited
US5062365A
Cited
US4698107A
Cited
US4696705A
Cited
US4833996A
Cited
US5004586A
Cited
US4834818A
Cited
US4734141A
Cited
US4919897A
Cited
US4758287A
Cited
US4834817A
Cited
US4865667A
Cited
US4959011A
Cited
US4806180A
Cited
US4890860A
Cited
US4982664A
Cited
US5094475A
Cited
US4909549A
Cited
US4948439A
Cited
US5062367A
Cited
US5003887A
Cited
US5005486A
Cited
US4950458A
Cited
US4931111A
Cited
US5033390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-26 | 1999-09-25 | 2000-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-26 | 2003-09-25 | 2004-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-26 | 2007-09-25 | 2008-03-26 | $7700.00 | Window Closed / Lapsed |