US2885736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrocellulose particles
Assignee: Olin Corp
•
Filing: 1956-03-26
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Granted: 1959-05-12
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Expires: 1976-03-26
Abstract
No abstract record available.
Inventors
- 👤 Jr John J O'neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:11
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0066; C08; C08B; C08B5/00; C08B5/02; C08B5/04; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD FOR MAKING SUBSTANTIALLY GLOBULAR PARTICLES OF NITROCELLULOSE HAVING A DIAMETER NOT SUBSTANTIALLY GREATER THAN 0.012 INCH WHICH COMPRISES FORMING A SLURRY BY SUSPENDING FIBERS OF NITROCELLULOSE IN AN AQUEOUS MEDIUM IN THE RATIO OF ABOUT 1 PART BY WEIGHT NITROCELULOSE PER 10 TO 17 PARTS BY WEIGHT AQUEOUS MEDIUM, COATING THE FIBER WITH A PROTECTIVE COLLOID, ADDING ABOUT 1.6 PARTS BY WEIGHT ETHYL ACETATE FOR EACH PART BY WEIGHT NITROCELLULOSE, THEREAFTER ADDING ETHYL ACETATE TO THE SLURRY AT A RATE NOT SUBSTANTIALLY GREATER THAN ABOUT 0.25 PART BY WEIGHT PER 100 PARTS BY WEIGHT NITROCELLULOSE PER SECOND WHILE MAINTAINING THE ETHYL ACETATE TO NITROCELLULOSE RATIO BELOW ABOUT 3:1, AGITATING THE SLURRY UNTIL THE FIBERS HAVE ASSUMED A GLOBULAR FORM, AND REMOVING THE SOLVENT FROM THE NITROCELLULOSE.
Claim 2
Independent Claim
128 words
A METHOD FOR MAKING SUBSTANTIALLY GLOBULAR PARTICLES OF NITROCELLULOSE HAVING A DIAMETER NOT SUBSTANTIALLY GREATER THAN 0.012 INCH WHICH COMPRISES FORMING A SLURRY BY SUSPENDING FIBERS OF NITROCELLULOSE IN AN AQUEOUS MEDIUM IN THE RATIO OF ABOUT 1 PART BY WEIGHT NITROCELULOSE PER 10 TO 17 PARTS BY WEIGHT AQUEOUS MEDIUM, COATING THE FIBER WITH A PROTECTIVE COLLOID, ADDING ABOUT 1.6 PARTS BY WEIGHT ETHYL ACETATE FOR EACH PART BY WEIGHT NITROCELLULOSE, THEREAFTER ADDING ETHYL ACETATE TO THE SLURRY AT A RATE NOT SUBSTANTIALLY GREATER THAN ABOUT 0.25 PART BY WEIGHT PER 100 PARTS BY WEIGHT NITROCELLULOSE PER SECOND WHILE MAINTAINING THE ETHYL ACETATE TO NITROCELLULOSE RATIO BELOW ABOUT 3:1, AGITATING THE SLURRY UNTIL THE FIBERS HAVE ASSUMED A GLOBULAR FORM, AND REMOVING THE SOLVENT FROM THE NITROCELLULOSE.
References Cited (Backward Citations)
US2027114A
Cited
US2206916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |