US3671515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical production of small particle nitrocellulose
Assignee: United States Department of the Navy
•
Filing: 1970-05-20
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Granted: 1972-06-20
•
Expires: 1990-05-20
Abstract
Abstract An improved process for manufacturing spherical small particle nitrocellulose wherein the prepared nitrocellulose lacquer is mixed with water and immediately subjected to a high shear emulsifying action to form the desired particles. No colloids, surfactants or emulsifying agents are employed in the process.
Inventors
- 👤 Charles D Cox
- 👤 Thomas Liggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:53
CPC Classifications
C; C09; C09D; C09D101/00; C09D101/08; C09D101/16; C09D101/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
The process of claim 1 wherein said contacting of the lacquer with a quantity of water occurs immediately prior to the subjection of the resultant mixture to a high shear emulsifying action.
Claim 2
Dependent Claim
31 words
The process of claim 1 wherein said contacting of the lacquer with a quantity of water and said subjecting the mixture thereof to a high shear emulsifying action occur substantially simultaneously.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein said organic water soluble or water miscible solvent is soluble in water at least to the extent of five parts per 100 parts of water at 20* C.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein said lacquer is comprised of about from 1.5 to about 35 percent by weight nitrocellulose.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein a stabilizing agent is added to the lacquer prior to contacting with water.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein said nitrocellulose has a nitrogen content of about 11.0 to about 13.4 percent.
Claim 7
Dependent Claim
16 words
The process of claim 7 wherein said nitrocellulose has a nitrogen content of about 12.6 percent.
References Cited (Backward Citations)
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Cited
US2915519A
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US2982643A
Cited
US3422169A
Cited
US3163567A
Cited
US3325315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |