US3565972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural adhesives from urethane prepolymers,polyepoxides,latent solid diamines,and lewis acid amine complexes
Assignee: Motors Liquidation Co
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Filing: 1968-02-26
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Granted: 1971-02-23
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Expires: 1988-02-26
Abstract
Abstract A RAPID CURING, HIGH STRENGTH STRUCTURAL ADHESIVE FORMULATION IS DISCLOSED WHICH MAY BE EMPLOYED IN EITHER A ONE-PART OR MULTI-PART COMPOSITION. IN A PREFERRED FORM, A ONE-PART FORMULATION IS EMPLOYED WHICH CONTAINS A POLYURETHANE PREPOLYMER FORMED BY THE REACTION BETWEEN TOLUENE DIISOCYANATE AND A POLYALKYLENE ETHER GLYCOL, A LOW MOLECULAR WEIGHT LIQUID EPOXY RESIN DERIVED FROM BISPHENOL-A AND EPICHLOROHYDRIN, A LATENT SOLID PRIMARY DIAMINE AND A SMALL BUT EFFECTIVE AMOUNT OF A LEWIS ACIDAMINE COMPLEX. THIS COMPOSITION HAS A PROLONGED SHELF LIFE AT NORMAL ROOM TEMPERATURE, BUT MAY BE CURED AT A RAPID RATE BY HEATING AT TEMPERATURES OF ABOUT 250*F. OR HIGHER.
Inventors
- 👤 James P Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:42
CPC Classifications
C; C09; C09J; C09J163/00; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/166; C08G18/22; C08L; C08L63/00; C08L75/00; C08L75/04; C09J175/00; C09J175/04; C09J175/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |