US4163682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for disposing of red phosphorus composition
Assignee: United States Department of the Navy
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Filing: 1978-10-05
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Granted: 1979-08-07
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Expires: 1998-10-05
Abstract
Abstract A method for disposing of a pyrotechnic composition comprised of red phosrus, manganese dioxide, magnesium, zinc oxide and linseed oil, with at least fifty percent of the composition being red phosphorus. The composition is burned in a first enclosed chamber and the products of combustion are drawn into a second enclosed chamber and burned. The product gases from the second enclosed chamber are sprayed with water to form phosphoric acid which is collected. The ashes in the first enclosed chamber are sprayed with water to produce phosphine which is burned in the first enclosed chamber and the residue is an inert ash.
Inventors
- 👤 Francis E. Montgomery
- 👤 James E. Short, Jr.
- 👤 William J. Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:30
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/20; Y; Y10; Y10S; Y10S149/00; Y10S149/124
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A method for disposing of pyrotechnic material comprised of at least fifty percent, by weight, of red phosphorus comprising, burning said pyrotechnic material in a first enclosed chamber and passing the products of combustion into a second enclosed chamber, then burning said products of combustion in said second enclosed chamber, then spraying the products of combustion from the second burning with water to produce phosphoric acid, then collecting said phosphoric acid, then spraying the ashes in said first enclosed chamber with water to produce phosphine, and then burning said phosphine in said first enclosed chamber.
Claim 2
Independent Claim
95 words
A method for disposing of pyrotechnic material comprised of at least fifty percent, by weight, of red phosphorus comprising, burning said pyrotechnic material in a first enclosed chamber and passing the products of combustion into a second enclosed chamber, then burning said products of combustion in said second enclosed chamber, then spraying the products of combustion from the second burning with water to produce phosphoric acid, then collecting said phosphoric acid, then spraying the ashes in said first enclosed chamber with water to produce phosphine, and then burning said phosphine in said first enclosed chamber.
Claim 3
Dependent Claim
50 words
A method for disposing of pyrotechnic material comprised of at least fifty percent, by weight, of red phosphorus as set forth in claim 1 wherein said pyrotechnic material is ignited by lighting a burner in said first enclosed chamber and then extinguishing said burner after ignition of said pyrotechnic material.
Claim 4
Dependent Claim
43 words
A method for disposing of pyrotechnic material comprised of at least fifty percent, by weight, of red phosphorus as set forth in claim 1 wherein said second enclosed chamber is preheated prior to receiving said products of combustion from said first enclosed chamber.
Claim 5
Dependent Claim
41 words
A method for disposing of pyrotechnic material comprised of at least fifty percent, by weight, of red phosphorus as set forth in claim 1 wherein said pyrotechnic material is cut into small pieces prior to loading into said first enclosed chamber.
Claim 6
Independent Claim
104 words
A method for disposing of pyrotechnic material containing manganese dioxide, magnesium, zinc oxide, linseed oil and at least fifty percent, by weight, of red phosphorus comprising, burning said pyrotechnic material in a first enclosed chamber and passing the products of combustion into a preheated second enclosed chamber, then burning said products of combustion in said preheated second enclosed chamber, then spraying the products of combustion from the second burning with water to produce phosphoric acid, then collecting said phosphoric acid, then spraying the ashes in said first enclosed chamber with water to produce phosphine, and then burning said phosphine in said first enclosed chamber.
Claim 7
Independent Claim
104 words
A method for disposing of pyrotechnic material containing manganese dioxide, magnesium, zinc oxide, linseed oil and at least fifty percent, by weight, of red phosphorus comprising, burning said pyrotechnic material in a first enclosed chamber and passing the products of combustion into a preheated second enclosed chamber, then burning said products of combustion in said preheated second enclosed chamber, then spraying the products of combustion from the second burning with water to produce phosphoric acid, then collecting said phosphoric acid, then spraying the ashes in said first enclosed chamber with water to produce phosphine, and then burning said phosphine in said first enclosed chamber.
Claim 8
Dependent Claim
57 words
A method for disposing of pyrotechnic material containing manganese dioxide, magnesium, zinc oxide, linseed oil and at least fifty percent, by weight, of red phosphorus as set forth in claim 5 wherein said pyrotechnic material is ignited by lighting a burner in said first enclosed chamber and then extinguishing said burner after ignition of said pyrotechnic material.
Claim 9
Dependent Claim
48 words
A method for disposing of pyrotechnic material containing manganese dioxide, magnesium, zinc oxide, linseed oil and at least fifty percent, by weight, of red phosphorus as set forth in claim 5 wherein said pyrotechnic material is cut into small pieces prior to loading into said first enclosed chamber.
Claim 10
Dependent Claim
49 words
A method for disposing of pyrotechnic material containing manganese dioxide, magnesium, zinc oxide, linseed oil and at least fifty percent, by weight, of red phosphorus as set forth in claim 7 wherein said pyrotechnic material is cut into small pieces by sawing said pyrotechnic material while submersed in water.
References Cited (Backward Citations)
US3607472A
Cited
US4113841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-06 | 1983-02-05 | 1983-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-06 | 1987-02-05 | 1987-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-06 | 1991-02-05 | 1991-08-07 | $7700.00 | Window Closed / Lapsed |