US2705689A
Expired / Lapsed
US
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Method of modifying the surface of unsaturated cellulose ester containing bodies
Assignee: Hercules Powder Co
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Filing: 1952-10-31
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Granted: 1955-04-05
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Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 William B Hewson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:49
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; D; D01; D01F; D01F2/00; D01F2/24; D01F2/28; D06; D06M; D06M11/00; D06M11/32; D06M11/50; D06M11/51; D06M11/54; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/67341; D06P3/00; D06P3/34; D06P3/40; D06P3/401; C08J2301/00; C08J2301/08; C08J2301/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
THE METHOD OF IMPROVING THE PROPERTIES OF SHAPED BODIES OF ORGANIC SOLVENT SOLUBLE UNSATURATED CELLULOSE ESTERS HAVING AN UNSATURATED ACYL D. S. IN THE RANGE OF 0.01 TO ABOUT 1.5 AND WHICH COMPRSES REACTING THE CELLULOSE ESTER WITH A 1.0% TO SATURATED AQUEOUS SOLUTION OF A PERMANGANATE SALT FOR A TIME SUFFICIENT TO CAUSE SURFACE DEPOSITION OF MANGANESE DIOXIDE AND SUBSEQUENTLY TREATING WITH A MANGANESE DIOXIDE DISSOLVING REAGENT.
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) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |