Patent US4090979A successfully refreshed from Google Patents.
US4090979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing chemical pump absorbents for a cartridge combustion-driven chemical laser
Assignee: United States Department of the Army
•
Filing: 1977-05-06
•
Granted: 1978-05-23
•
Expires: 1997-05-06
Abstract
Abstract A process for producing improved chemical laser absorbent materials by precipitating the chemical laser absorbent materials of metal from liquid anhydrous ammonia at very low temperature to produce an absorbent material that has a high surface area and when desired to deposit the chemical absorbent material on a substrate material in the process of precipitating the absorbent material from the liquid ammonia. The chemical metal absorbent material is adapted for containment of the effluent gases from a chemical laser and the substrate when used absorbs the heat of reaction.
Inventors
- 👤 John R. Ogren
- 👤 Gilbert J. Ogle
- 👤 Eugene V. Rutkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:36
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/095; B; B01; B01J; B01J20/00; B01J20/02; B01J20/04; B01J20/046; B01J20/06; B01J20/30; B01J20/3085; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3236; Y; Y10; Y10S; Y10S502/00; Y10S502/523
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
52 words
A process for producing improved chemical absorbent materials, comprising precipitating metal that is dissolvable in anhydrous ammonia at liquid nitrogen temperature from a solution of the metal and anhydrous ammonia that is cooled to low temperature to form a precipitated metal of high surface area when the anhydrous ammonia is distilled off.
Claim 2
Dependent Claim
52 words
A process for producing improved chemical absorbent materials, comprising precipitating metal that is dissolvable in anhydrous ammonia at liquid nitrogen temperature from a solution of the metal and anhydrous ammonia that is cooled to low temperature to form a precipitated metal of high surface area when the anhydrous ammonia is distilled off.
Claim 3
Dependent Claim
37 words
A process for producing improved chemcial absorbent material as set forth in claim 1, wherein said solution is cooled to a temperature between about -30° C and about -35° C before said anhydrous ammonia is distilled off.
Claim 4
Dependent Claim
32 words
A process for producing improved chemical absorbent material as set forth in claim 2, wherein said metal is selected from the group consisting of lithium, sodium, potassium, calcium, magnesium and mixtures thereof.
Claim 5
Dependent Claim
26 words
A process for producing improved chemical absorbent material as set forth in claim 3, wherein said anhydrous ammonia is distilled off at less than 0° C.
Claim 6
Dependent Claim
23 words
A process for producing improved chemical absorbent material as set forth in claim 3, wherein said metal is precipitated onto a substrate material.
Claim 7
Dependent Claim
46 words
A process for producing improved chemical absorbent material as set forth in claim 5, wherein said substrate material is selected from the group consisting of potassium chloride, ceramic oxides and inorganic salts and mixtures thereof, metals and alloys that are not dissolvable in anhydrous liquid ammonia.
Claim 8
Dependent Claim
23 words
A process as set forth in claim 4, wherein said chemical absorbent material is used as a chemical pump for a chemical laser.
Claim 9
Dependent Claim
26 words
A process as set forth in claim 6, wherein said chemical absorbent material and said substrate are used as a chemical pump for a chemical laser.
References Cited (Backward Citations)
US3976447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |