US2856636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating shaped articles from non-heat-setting sulfone acid-diol polymers
Assignee: Eastman Kodak Co
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Filing: 1954-12-09
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Granted: 1958-10-21
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Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Roger M Schulken
- 👤 Long Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:52
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; D; D01; D01F; D01F11/00; D01F11/04; D01F11/08; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE PROCESS OF FORMING SHAPED ARTICLES OF IMPROVED PROPERTIES FROM NON-HEAT-SETTING SULFONE-DIOL POLYMERS WHICH COMPRISES MIXING A LACTONE SOFTENING AGENT WITH THE POLYMER, FORMING THE MIXTURE INTO A SHAPED ARTICLE, TREATING THE ARTICLE WITH AN OIL TO REMOVE THE ADDED LACTONE AGENT AND LEAVE THE SHAPED ARTICLE COMPRISED SUBSTANTIALLY OF SAID POLYMER, SUBJECTING THE ARTICLE TO A RELATIVELY HIGH HEATING AT ABOVE 200*C. BUT BELOW THE MELTING POINT OF THE POLYMER, STRETCHING THE SHAPED ARTICLE AT A TEMPERATURE WITHIN THE RANGE OF 135-190*C. AND THEN SETTING THE STRETCHED, SHAPED ARTICLE BY EXPOSURE THEREOF FOR A SHORT TIME TO A CHEMICAL FLUID FROM THE GROUP CONSISTING OF METHYLENE CHLORIDE, CHLOROFORM, DIFLUORO DICHLOROETHANE.
Claim 2
Dependent Claim
111 words
THE PROCESS OF FORMING SHAPED ARTICLES OF IMPROVED PROPERTIES FROM NON-HEAT-SETTING SULFONE-DIOL POLYMERS WHICH COMPRISES MIXING A LACTONE SOFTENING AGENT WITH THE POLYMER, FORMING THE MIXTURE INTO A SHAPED ARTICLE, TREATING THE ARTICLE WITH AN OIL TO REMOVE THE ADDED LACTONE AGENT AND LEAVE THE SHAPED ARTICLE COMPRISED SUBSTANTIALLY OF SAID POLYMER, SUBJECTING THE ARTICLE TO A RELATIVELY HIGH HEATING AT ABOVE 200*C. BUT BELOW THE MELTING POINT OF THE POLYMER, STRETCHING THE SHAPED ARTICLE AT A TEMPERATURE WITHIN THE RANGE OF 135-190*C. AND THEN SETTING THE STRETCHED, SHAPED ARTICLE BY EXPOSURE THEREOF FOR A SHORT TIME TO A CHEMICAL FLUID FROM THE GROUP CONSISTING OF METHYLENE CHLORIDE, CHLOROFORM, DIFLUORO DICHLOROETHANE.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |