Patent US2779974A successfully refreshed from Google Patents.
US2779974A
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Preparation of highly polymeric material in a form suitable for transport
Assignee: Acordis UK Ltd
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Filing: 1952-08-20
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Granted: 1957-02-05
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Expires: 1972-08-20
Abstract
No abstract record available.
Inventors
- 👤 Billing Joseph
- 👤 Bostock Cyril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:29
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/22; Y; Y10; Y10S; Y10S264/00; Y10S264/64; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
PROCESS FOR CONVERTING PARTICULATE CELLULOSE ACETATE OF BULK DENSITY BELOW 30 LB. PER CUBIC FOOT INTO A FORM MORE SUITABLE FOR TRANSPORT, WHICH COMPRISES COMPRESSING THE CELLULOSE ACETATE, WHILE IT IS FREE SOLVENTS AND SOFTENING AGENTS AND AT A TEMPERATURE BELOW ITS THERMAL SOFTENING TEMPERATURE, INTO A BLOCK HAVING A DENSITY BETWEEN 50% AND 75% OF THE TRUE DENSITY OF THE CELLULOSE ACETATE, APPLYING A VOLATILE SOLVENT FOR THE CELLULOSE ACETATE TO THE SURFACES OF THE BLOCK, ALLOWING THE SOLVENT TO PENETRATE THE BLOCK A CONTINUOUS SKIN OF THICKNESS BETWEEN 0.005 REMOVING THE SOLVENT BY EVAPORATION, THEREBY FORMING ON THE BLOCK A CONTINUOUS SKIN OF THICKESS BETWEE 0.005 AND 0.1 INCH TO THUS PRODUCE A BLOCK WHICH IS RESISTANT TO THE ORDINARY DISRUPTIVE FORCES ATTENDING TRANSPORT BUT WHCIH CAN BE READILY BROKEN DOWN BY IMPACT ATTRITION IN A HAMMER MILL OR LIKE DEVICE.
Claim 2
Dependent Claim
143 words
PROCESS FOR CONVERTING PARTICULATE CELLULOSE ACETATE OF BULK DENSITY BELOW 30 LB. PER CUBIC FOOT INTO A FORM MORE SUITABLE FOR TRANSPORT, WHICH COMPRISES COMPRESSING THE CELLULOSE ACETATE, WHILE IT IS FREE SOLVENTS AND SOFTENING AGENTS AND AT A TEMPERATURE BELOW ITS THERMAL SOFTENING TEMPERATURE, INTO A BLOCK HAVING A DENSITY BETWEEN 50% AND 75% OF THE TRUE DENSITY OF THE CELLULOSE ACETATE, APPLYING A VOLATILE SOLVENT FOR THE CELLULOSE ACETATE TO THE SURFACES OF THE BLOCK, ALLOWING THE SOLVENT TO PENETRATE THE BLOCK A CONTINUOUS SKIN OF THICKNESS BETWEEN 0.005 REMOVING THE SOLVENT BY EVAPORATION, THEREBY FORMING ON THE BLOCK A CONTINUOUS SKIN OF THICKESS BETWEE 0.005 AND 0.1 INCH TO THUS PRODUCE A BLOCK WHICH IS RESISTANT TO THE ORDINARY DISRUPTIVE FORCES ATTENDING TRANSPORT BUT WHCIH CAN BE READILY BROKEN DOWN BY IMPACT ATTRITION IN A HAMMER MILL OR LIKE DEVICE.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |