Patent US3673286A successfully refreshed from Google Patents.
US3673286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making propellant body having voids throughout body
Assignee: Daisy Manufacturing Co Inc
•
Filing: 1970-01-19
•
Granted: 1972-06-27
•
Expires: 1990-01-19
Abstract
Abstract A propellant for caseless ammunition for firearms and processes of manufacture thereof comprising at least partial dissolving of commercial nitrocellulose, wetted with a predetermined amount of a volatile wetting agent such as ethyl alcohol, by a solvent, such as acetone, to form a wet doughy mass of propellant, uniformly mixing a predetermined amount and size of removable filler particles, such as 30 percent coarse and 70 percent fine potassium nitrate particles in the wet doughy mass of propellant, forming a propellant body, and removing the wetting agent, solvent, and potassium nitrate particles to form voids throughout the propellant body.
Inventors
- 👤 Robert F Remaly
- 👤 William A Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:18
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0091; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/112
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
23 words
The invention as defined in claim 1 and wherein the ratio by weight of wetting agent to nitrocellulose is between 1:5 and 2:5.
Claim 2
Dependent Claim
33 words
at least partially dissolving the wet nitrocellulose by mixing with a volatile nitrocellulose solvent inert and miscible with the wetting agent to form a wet doughy mass of nitrocellulose, solvent, and wetting agent;
Claim 3
Dependent Claim
10 words
uniformly dispersing a removable filler throughout the wet doughy mass;
Claim 4
Dependent Claim
17 words
The invention as defined in claim 2 and wherein the wetting agent consists of alcohol and water.
Claim 5
Dependent Claim
22 words
The invention as defined in claim 3 and wherein the ratio by weight of alcohol to water is between 20:3 and 30:2.
Claim 6
Dependent Claim
16 words
forming the wet doughy mass into a propellant body with the removable filler uniformly dispersed throughout;
Claim 7
Dependent Claim
27 words
removing the wetting agent and solvent and removable filler without substantially changing the form of the propellant body and thereby forming voids throughout the propellant body; and
Claim 8
Dependent Claim
16 words
The invention as defined in claim 2 and wherein the wetting agent consists primarily of alcohol.
Claim 9
Dependent Claim
27 words
The invention as defined in claim 1 and wherein there is between approximately 25 and 33 parts by weight wetting agent per 100 parts by weight nitrocellulose.
Claim 10
Dependent Claim
13 words
drying the propellant body to provide a hard porous propellant for caseless ammunition.
Claim 11
Dependent Claim
24 words
The invention as defined in claim 1 and wherein there is approximately 25 parts by weight wetting agent per 100 parts by weight nitrocellulose.
Claim 12
Dependent Claim
33 words
The invention as defined in claim 1 and wherein the amount of solvent is in the ratio of approximately between 70 and 120 parts by weight solvent to 100 parts by weight nitrocellulose.
Claim 13
Dependent Claim
26 words
The invention as defined in claim 8 and wherein the amount is less than approximately 100 parts by weight solvent to 100 parts by weight nitrocellulose.
Claim 14
Dependent Claim
26 words
The invention as defined in claim 9 and wherein the amount is less than approximately 75 parts by weight solvent to 100 parts by weight nitrocellulose.
Claim 15
Dependent Claim
30 words
The invention as defined in claim 1 wherein the solvent is acetone in the ratio of approximately 70 - 75 parts by weight acetone to 100 parts by weight nitrocellulose.
Claim 16
Dependent Claim
22 words
The invention as defined in claim 1 and wherein the ratio of removable filler to nitrocellulose is less than 2 to 1.
Claim 17
Dependent Claim
20 words
The invention as defined in claim 12 and wherein the ratio is between 1.7 to 1 and 1.9 to 1.
Claim 18
Dependent Claim
15 words
The invention as defined in claim 13 and wherein the ratio is 1.8 to 1.
Claim 19
Dependent Claim
21 words
The invention as defined in claim 1 and wherein the removable filler is a blend of coarse and fine size particles.
Claim 20
Dependent Claim
22 words
The invention as defined in claim 15 and wherein the coarse particle size is distributed between approximately 0.59 mm and 0.21 mm.
Claim 21
Dependent Claim
19 words
The invention as defined in claim 16 and wherein the fine particle size is less than approximately 0.074 mm.
Claim 22
Dependent Claim
23 words
The invention as defined in claim 17 and wherein the blend consists of approximately 30 percent coarse particles and 70 percent fine particles.
Claim 23
Dependent Claim
26 words
The invention as defined in claim 15 wherein the blend consists of approximately 20 to 40 percent coarse particles and 80 to 60 percent fine particles.
Claim 24
Dependent Claim
22 words
The invention as defined in claim 19 and wherein the blend is approximately 30 percent coarse particles and 70 percent fine particles.
Claim 25
Dependent Claim
64 words
The invention as defined in claim 1 and wherein the volatile solvent and wetting agent dissolve some of the filler in the wet doughy mass, and wherein the volatile solvent and wetting agent are removed from the propellant before all of the filler and some of the dissolved filler is precipitated out in the propellant during removal of the volatile solvent and wetting agent.
Claim 26
Dependent Claim
50 words
The invention as defined in claim 21 and wherein after forming the propellant body is first air dried to remove some of the volatile solvent and wetting agent, and then the propellant body is placed in boiling water to remove the filler and any remaining volatile solvent and wetting agent.
References Cited (Backward Citations)
US3255281A
Cited
US3353438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |