Patent US3346675A successfully refreshed from Google Patents.
US3346675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing small particle nitrocellulose
Assignee: Hercules LLC
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Filing: 1966-09-08
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Granted: 1967-10-10
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Expires: 1986-09-08
Abstract
No abstract record available.
Inventors
- 👤 John J Sapiego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:14
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0008; C06B21/0033; C08; C08B; C08B5/00; C08B5/02; C08B5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR PREPARING A DENSIFIED NITROCELLULOSE PRODUCT WHICH COMPRISES: (A) FORMING A SLURRY OF FIBROUS NITROCELLULOSE IN WATER, (B) SUBJECTING THE SLURRY TO HIGH SHEAR AGITATION AT A TEMPERATURE OF ABOUT 20 TO 50*C., (C) WHILE CONTINUING SAID HIGH SHEAR AGITATION AT ABOUT 20 TO 50*C., ADDING AN ACTIVE NITROCELLULOSE SOLVENT HAVING LIMITED SOLUBILITY IN WATER IN AMOUNT TO SOFTEN AND SWELL THE NITROCELLULOSE FIBERS WITHOUT DISSOLVING THE SAME; AND (D) REMOVING SOLVENT BY AZEOTROPIC DISTILLATION WHILE CONTINUING VIGOROUS AGITATION.
Claim 2
Dependent Claim
81 words
A PROCESS FOR PREPARING A DENSIFIED NITROCELLULOSE PRODUCT WHICH COMPRISES: (A) FORMING A SLURRY OF FIBROUS NITROCELLULOSE IN WATER, (B) SUBJECTING THE SLURRY TO HIGH SHEAR AGITATION AT A TEMPERATURE OF ABOUT 20 TO 50*C., (C) WHILE CONTINUING SAID HIGH SHEAR AGITATION AT ABOUT 20 TO 50*C., ADDING AN ACTIVE NITROCELLULOSE SOLVENT HAVING LIMITED SOLUBILITY IN WATER IN AMOUNT TO SOFTEN AND SWELL THE NITROCELLULOSE FIBERS WITHOUT DISSOLVING THE SAME; AND (D) REMOVING SOLVENT BY AZEOTROPIC DISTILLATION WHILE CONTINUING VIGOROUS AGITATION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |