US3197330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a pressure-sensitive adhesive tape having a paper backing unified with an elastomeric polyurethane
Assignee: Permacel
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Filing: 1961-03-28
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Granted: 1965-07-27
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Expires: 1981-03-28
Abstract
No abstract record available.
Inventors
- 👤 Bartell Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:22
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/205; C09J7/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A METHOD OF MAKING A PRESSURE-SENSITIVE ADHESIVE TAPE COMPRISING FORMING A PREPOLYMER BY REACTING AN ORGANIC COMPOUND HAVING A REACTIVE-HYDROGEN GROUP SELECTED FROM THE CLASS CONSISTING OF POLYETHERS AND POLYESTERS WITH AN ORGANIC DIISOCYANATE, THE MOLAR RATIO OF SAID ORGANIC COMPOUND TO SAID ORGANIC DIISOCYANATE BEING AT FROM ABOUT 1.5:1 TO 10:1, MIXING SAID PREPOLYMER WITH FURTHER AMOUNTS OF SAID ORGANIC COMPOUND HAVING A REACTIVE-HYDROGEN GROUP IN AN INERT ORGANIC SOLVENT FOR SAID PREPOLYMER AND SAID ORGANIC COMPOUND SO THAT THAT OVERALL RATIO OF MOLS OF HYDROXYL GROUPS DTO MOLS OF ISOCYANATE GROUPS LIES WITHIN THE RAGE OF FROM ABOUT 0.3:1 TO 1.5:1, INCORPORATING SAID SOLVENT MIXTURE INTO A THIN FLEXIBLE PAPER WEB IN AN AMOUNT TO YIELD FROM ABOUT 10 TO 100% BY WEIGHT OF ELASTOMERIC POLYURETHNAE BASED ON THE WEIGHT OF THE NON-UNIFIED PAPER, CURING SAID MIXTURE IN SAID PAPER WEB SO THAT AN ELASTOMERIC POLYURETHANE IS FORMED, AND COATING A PRESSURE-SENSITIVE ADHESIVE ON AT LEAST ONE SURFACE OF SAID CURED PAPER WEB.
Claim 2
Independent Claim
165 words
A METHOD OF MAKING A PRESSURE-SENSITIVE ADHESIVE TAPE COMPRISING FORMING A PREPOLYMER BY REACTING AN ORGANIC COMPOUND HAVING A REACTIVE-HYDROGEN GROUP SELECTED FROM THE CLASS CONSISTING OF POLYETHERS AND POLYESTERS WITH AN ORGANIC DIISOCYANATE, THE MOLAR RATIO OF SAID ORGANIC COMPOUND TO SAID ORGANIC DIISOCYANATE BEING AT FROM ABOUT 1.5:1 TO 10:1, MIXING SAID PREPOLYMER WITH FURTHER AMOUNTS OF SAID ORGANIC COMPOUND HAVING A REACTIVE-HYDROGEN GROUP IN AN INERT ORGANIC SOLVENT FOR SAID PREPOLYMER AND SAID ORGANIC COMPOUND SO THAT THAT OVERALL RATIO OF MOLS OF HYDROXYL GROUPS DTO MOLS OF ISOCYANATE GROUPS LIES WITHIN THE RAGE OF FROM ABOUT 0.3:1 TO 1.5:1, INCORPORATING SAID SOLVENT MIXTURE INTO A THIN FLEXIBLE PAPER WEB IN AN AMOUNT TO YIELD FROM ABOUT 10 TO 100% BY WEIGHT OF ELASTOMERIC POLYURETHNAE BASED ON THE WEIGHT OF THE NON-UNIFIED PAPER, CURING SAID MIXTURE IN SAID PAPER WEB SO THAT AN ELASTOMERIC POLYURETHANE IS FORMED, AND COATING A PRESSURE-SENSITIVE ADHESIVE ON AT LEAST ONE SURFACE OF SAID CURED PAPER WEB.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |