Patent US2948601A successfully refreshed from Google Patents.
US2948601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Densification of nitrocellulose
Assignee: Hercules Powder Co
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Filing: 1958-11-17
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Granted: 1960-08-09
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Vernon R Grassie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:56
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR DENSIFYING NITROCELLULOSE WHICH COMPRISES CONTACTING FIBROUS NITROCELLULOSE WITH AGITATION IN A HEATED AQUEOUS BATH WITH AN ORGANIC LIQUID SOLVENT WHICH HAS ACTIVE SOLVENT POWER FOR SAID NITROCELLULOSE AND WHICH FORMS A MINIMUM BOILING AZEOTROPIC MIXTURE WITH WATER, SAID SOLVEDNT BEING PRESENT IN AN AMOUNT TO SOFTEN AND DESTROY THE FIBROUS STRUCTURE OF SAID NITROCELLULOSE WITHOUT DISSOLUTION THEREOF, SAID BATH BEING HEATED TO AT LEAST THE BOILING POINT OF THE WATER-SOLVENT AZEOTROPE DURING THE ENTIRE PERIOD OF CONTACT BETWEEN SAID NITROCELLULOSE AND SAID SOLVENT, AND THEREAFTER REMOVING SUBSTANTIALLY ALL OF THE SOLVENT BY DISTILLATION WHILE CONTINUING AGITATION TO FORM SMOOTH, HARDENED, DENSIFIED AND IRREGULAR PARTICLES OF PARTIALLY COLLOIDED NITROCELLULOSE.
Claim 2
Dependent Claim
111 words
A PROCESS FOR DENSIFYING NITROCELLULOSE WHICH COMPRISES CONTACTING FIBROUS NITROCELLULOSE WITH AGITATION IN A HEATED AQUEOUS BATH WITH AN ORGANIC LIQUID SOLVENT WHICH HAS ACTIVE SOLVENT POWER FOR SAID NITROCELLULOSE AND WHICH FORMS A MINIMUM BOILING AZEOTROPIC MIXTURE WITH WATER, SAID SOLVEDNT BEING PRESENT IN AN AMOUNT TO SOFTEN AND DESTROY THE FIBROUS STRUCTURE OF SAID NITROCELLULOSE WITHOUT DISSOLUTION THEREOF, SAID BATH BEING HEATED TO AT LEAST THE BOILING POINT OF THE WATER-SOLVENT AZEOTROPE DURING THE ENTIRE PERIOD OF CONTACT BETWEEN SAID NITROCELLULOSE AND SAID SOLVENT, AND THEREAFTER REMOVING SUBSTANTIALLY ALL OF THE SOLVENT BY DISTILLATION WHILE CONTINUING AGITATION TO FORM SMOOTH, HARDENED, DENSIFIED AND IRREGULAR PARTICLES OF PARTIALLY COLLOIDED NITROCELLULOSE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |