US3377323A
Expired / Lapsed
US
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Method for pulverizing polymers
Assignee: Asahi Kasei Corp
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Filing: 1964-06-10
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Granted: 1968-04-09
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Ioka Akira
- 👤 Kato Tsuneyuki
- 👤 Toyoda Yutaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:48
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; B; B29; B29B; B29B9/00; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08J2377/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF PARTICULARIZING POLYMERS COMPRISING HEATING A MASS WHICH IS INSOLUBLE IN WATER AT TEMPERATURES UP TO THE BOILING POING OF WATER AT NORMAL PRESSURE IN AN AUTOCLAVE SOLELY IN THE PRESENCE OF WATER IN AN AMOUNT AT LEAST EQUAL IN WEIGHT TO THAT OF SAID POLYMER, THE POLYMER HAVING A SOLUBILITY PARAMETER IN WATER OF AT LEAST 10, THE TEMPERATURE IN THE AUTOCLAVE BEING LESS THAN THE MELTING POINT OF THE POLYMER AND AT LEAST 155*C. TO DISSOLVE SAID POLYMER IN WATER, AND THEN SPRAYING THE CONTENTS OF THE AUTOCLAVE UNDER PRESSURE, THROUGH A NOZZLE, WHILE HEATED TO OBTAIN THE POLYMER IN POWDER STATE.
Claim 2
Independent Claim
106 words
A METHOD OF PARTICULARIZING POLYMERS COMPRISING HEATING A MASS WHICH IS INSOLUBLE IN WATER AT TEMPERATURES UP TO THE BOILING POING OF WATER AT NORMAL PRESSURE IN AN AUTOCLAVE SOLELY IN THE PRESENCE OF WATER IN AN AMOUNT AT LEAST EQUAL IN WEIGHT TO THAT OF SAID POLYMER, THE POLYMER HAVING A SOLUBILITY PARAMETER IN WATER OF AT LEAST 10, THE TEMPERATURE IN THE AUTOCLAVE BEING LESS THAN THE MELTING POINT OF THE POLYMER AND AT LEAST 155*C. TO DISSOLVE SAID POLYMER IN WATER, AND THEN SPRAYING THE CONTENTS OF THE AUTOCLAVE UNDER PRESSURE, THROUGH A NOZZLE, WHILE HEATED TO OBTAIN THE POLYMER IN POWDER STATE.
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) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |