US2740723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of finely divided cellulose plastics
Assignee: Hercules Powder Co
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Filing: 1951-05-08
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Granted: 1956-04-03
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Expires: 1971-05-08
Abstract
No abstract record available.
Inventors
- 👤 Robert S Voris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C09; C09D; C09D101/00; C09D101/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE PROCESS FOR PREPARING A DRY FINELY-DIVIDED PLASTIC COMPOSITION WHICH COMPRISES EMULSIFYING A LACQUER IN WATER TO FORM A LACQUER-IN-WATER EMULSION, SAID LACQUER ESSENTIALLY CONSISTING OF CELLULOSIC PLASTIC DISSOLVED IN A SUBSTANTIALLY WATER-IMMISCIBLE VOLATILE SOLVENT THEREFOR, SAID CELLULOSIC PLASTIC BEING SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS AND ETHERS CONTAINING ONLY CARBON, HYDROGEN AND OXYGEN, AND SPRAYING THE EMULSION THUS FORMED INTO A HEATED GASEOUS MEDIUM TO VAPORIZE LIQUID FROM SAID EMULSION AND PRODUCE A DRY POWDER OF SAID PLASTIC, SAID POWDER BEING A MIXTURE OF SOLID AND HOLLOW SPHEROIDS HAVING A BULK DENSITY OF AT LEAST 0.3 GRAM PER MILLILITER AND AN AVERAGE PARTICLE DIAMETER OF LESS THAN 15 MICRONS, AND SUITABLE FOR SUSPENSION IN A LIQUID MEDIUM WHICH IS A NONSOLVENT FOR SAID CELLULOSIC PLASTIC TO PRODUCE A SUSPENSION-TYPE COATING COMPOSITION.
Claim 2
Dependent Claim
134 words
THE PROCESS FOR PREPARING A DRY FINELY-DIVIDED PLASTIC COMPOSITION WHICH COMPRISES EMULSIFYING A LACQUER IN WATER TO FORM A LACQUER-IN-WATER EMULSION, SAID LACQUER ESSENTIALLY CONSISTING OF CELLULOSIC PLASTIC DISSOLVED IN A SUBSTANTIALLY WATER-IMMISCIBLE VOLATILE SOLVENT THEREFOR, SAID CELLULOSIC PLASTIC BEING SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS AND ETHERS CONTAINING ONLY CARBON, HYDROGEN AND OXYGEN, AND SPRAYING THE EMULSION THUS FORMED INTO A HEATED GASEOUS MEDIUM TO VAPORIZE LIQUID FROM SAID EMULSION AND PRODUCE A DRY POWDER OF SAID PLASTIC, SAID POWDER BEING A MIXTURE OF SOLID AND HOLLOW SPHEROIDS HAVING A BULK DENSITY OF AT LEAST 0.3 GRAM PER MILLILITER AND AN AVERAGE PARTICLE DIAMETER OF LESS THAN 15 MICRONS, AND SUITABLE FOR SUSPENSION IN A LIQUID MEDIUM WHICH IS A NONSOLVENT FOR SAID CELLULOSIC PLASTIC TO PRODUCE A SUSPENSION-TYPE COATING COMPOSITION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |