Patent USH705H successfully refreshed from Google Patents.
USH705H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making smoke producing composition
Assignee: United States Department of the Army
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Filing: 1985-10-09
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Granted: 1989-11-07
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Expires: 2005-10-09
Abstract
Abstract In general, this invention relates to smoke-producing pellets for use in a mortar shell. More particularly, this invention relates to an improved process of making smoke-producing pellets for the 81 mm cartridge of the XM819 mortar shell.
Inventors
- 👤 Joel H. Selzer
- 👤 Michael D. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:04
CPC Classifications
C; C06; C06B; C06B39/00; C06D; C06D3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
An improved method of preparing a smoke-composition for processing by automated equipment consisting essentially of: mixing about 933 grams of a liquid epoxy-curing system with about 1.75 grams of acetone per gram of epoxy-curing system, coating about 22.7 kilograms of red phosphorous with said epoxy-curing system, blending about 4 kilograms of sodium nitrate and about 4 liters of acetone with said coated mixture, drying the resulting mixture at about 70° F. for about 60 minutes, and coating said dried misture with about 1.5 percent by weight of fumed silica, consolidating the coated mixture into pellets weighing between 42.0 and 44.0 grams, loading 28 pellets into the cartridge body, and curing for 48 hours at 140° F.
Claim 2
Dependent Claim
116 words
An improved method of preparing a smoke-composition for processing by automated equipment consisting essentially of: mixing about 933 grams of a liquid epoxy-curing system with about 1.75 grams of acetone per gram of epoxy-curing system, coating about 22.7 kilograms of red phosphorous with said epoxy-curing system, blending about 4 kilograms of sodium nitrate and about 4 liters of acetone with said coated mixture, drying the resulting mixture at about 70° F. for about 60 minutes, and coating said dried misture with about 1.5 percent by weight of fumed silica, consolidating the coated mixture into pellets weighing between 42.0 and 44.0 grams, loading 28 pellets into the cartridge body, and curing for 48 hours at 140° F.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein a equal weight of epoxy and curing agent are mixed for about 15 minutes prior to use until a cream-colored liquid is produced.
Claim 4
Dependent Claim
24 words
The method of claim 2 wherein about 4 liters of acetone are mixed for about 15 minutes with said epoxy-curing system until cloudiness disappears.
Claim 5
Dependent Claim
19 words
The method of claim 3 wherein said red phosphorous is mixed with said epoxy-curing system for about 30 seconds.
Claim 6
Dependent Claim
25 words
The method of claim 4 wherein said sodium nitrate is pulverized, dried at 140° F., and passed through a 30 mesh screen prior to use.
Claim 7
Dependent Claim
20 words
The method of claim 5 wherein said acetone during the blending stage is reduced to about 14 percent by weight.
Claim 8
Dependent Claim
24 words
The method of claim 6 wherein said acetone during the drying stage is reduced to between about 0.75 and about 1.0 percent by weight.
Claim 9
Dependent Claim
19 words
The method of claim 7 wherein said dried mixture is coated by mixing with fumed silica for 15 minutes.
Claim 10
Dependent Claim
20 words
The method of claim 8 wherein said coated mixture is consolidated into pellets weighing between 42.0 and 44.0 grams each.
Claim 11
Dependent Claim
21 words
The method of claim 9 wherein said pellets are loaded into cartridge bodies and cured for 48 hours at 140° F.
References Cited (Backward Citations)
US4503004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |