US3420231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic cast forming material including an inversely water soluble resin
Assignee: Johnson and Johnson
•
Filing: 1966-07-18
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Granted: 1969-01-07
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Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Martin I Edenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/07; Y; Y10; Y10S; Y10S428/00; Y10S428/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A THERMOPLASTIC CAST FORMING SHEET MATERIAL WOUND ON ITSELF IN ROLL FORM COMPRISING A BASE THERMOPLASTIC RESIN WHICH IS NORMALLY RELATIVELY HARD, RIGID AND NONCOHESIVE AT ROOM TEMPERATURE AND AT TEMPERATURES UP TO ABOUT 100*F. BUT WHICH BECOMES A SOFT, MOLDABLE AND COHESIVE AT A TEMPERATURE ABOVE ABOUT 100*F. AND BELOW ABOUT 165*F.; AND AN INVERSELY WATER SOLUBLE RESIN WHICH WHEN HEATED IN WATER BECOMES RELATIVELY INSOLUBLE AT A TEMPERATURE BELOW ABOUT 165*F. AND WHICH WHEN THEREAFTER COOLED IN WATER BECOMES RELATIVELY SOLUBLE AT A TEMPERATURE ABOVE THE TEMPERATURE AT WHICH THE BASE THERMOPLASTIC RESIN REHARDENS, AT LEAST A PORTION OF SAID INVERSELY SOLUBLE RESIN BEING INTERPOSED BETWEEN ADJACENT ROLL CONVOLUTIONS TO SEPARATE PORTIONS OF SAID BASE RESIN IN SAID ADJACENT ROLL CONVOLUTIONS.
Claim 2
Dependent Claim
123 words
A THERMOPLASTIC CAST FORMING SHEET MATERIAL WOUND ON ITSELF IN ROLL FORM COMPRISING A BASE THERMOPLASTIC RESIN WHICH IS NORMALLY RELATIVELY HARD, RIGID AND NONCOHESIVE AT ROOM TEMPERATURE AND AT TEMPERATURES UP TO ABOUT 100*F. BUT WHICH BECOMES A SOFT, MOLDABLE AND COHESIVE AT A TEMPERATURE ABOVE ABOUT 100*F. AND BELOW ABOUT 165*F.; AND AN INVERSELY WATER SOLUBLE RESIN WHICH WHEN HEATED IN WATER BECOMES RELATIVELY INSOLUBLE AT A TEMPERATURE BELOW ABOUT 165*F. AND WHICH WHEN THEREAFTER COOLED IN WATER BECOMES RELATIVELY SOLUBLE AT A TEMPERATURE ABOVE THE TEMPERATURE AT WHICH THE BASE THERMOPLASTIC RESIN REHARDENS, AT LEAST A PORTION OF SAID INVERSELY SOLUBLE RESIN BEING INTERPOSED BETWEEN ADJACENT ROLL CONVOLUTIONS TO SEPARATE PORTIONS OF SAID BASE RESIN IN SAID ADJACENT ROLL CONVOLUTIONS.
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |