Patent US2997464A successfully refreshed from Google Patents.
US2997464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical product and method
Assignee: Johnson and Johnson
•
Filing: 1958-09-04
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Granted: 1961-08-22
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Expires: 1978-09-04
Abstract
No abstract record available.
Inventors
- 👤 John C Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:09
CPC Classifications
C; C09; C09J; C09J135/00; C09J135/08; C08; C08F; C08F8/00; C09J135/02; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/31504; Y10T428/31786; Y10T428/31794; Y10T428/31797
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN ADHESIVE COMPOSITION HAVING A PLASTICITY NOT GREATER THAN ABOUT 4.0 MM. AND A COLD FLOW NOT GREATER THAN ABOUT 2.5 INCHES, COMPRISING A CROSS-LINKED ESTER OF A COPOLYMER COMPRISING ABOUT EQUIMOLECULAR PROPORTIONS OF MALEIC ANHYDRIDE AND AN ALKYL VINYL ETHER, THE ALKYL GROUP OF WHICH CONTAINS FROM 1 TO 8 CARBON ATOMS, SAID COPOLYMER HAVING AN INTRINSIC VISCOSITY IN THE RANGE FROM ABOUT 0.2 TO 2.0, ABOUT 65 TO 95 PERCENT OF THE POTENTIAL CARBOXY GROUPS IN SAID COPOLYMER BEING ESTERIFIED WITH AN ALIPHATIC PRIMARY MONOHYDRIC SATURATED ALCOHOL CONTAINING 6 TO 16 CARBON ATOMS, SAID ESTER BEING CROSS-LINKED WITH A POLYHYDRIC ALCOHOL OF WHICH ONLY THE HYDROXY GROUPS REACT WITH THE CARBOXY GROUPS OF THE COPOLYMER, SAID CROSS-LINKING BEING SUFFICIENT TO IMPART TO SAID ESTER A GEL CONTENT IN THE RANGE FROM ABOUT 10 TO 100 PERCENT BY WEIGHT OF THE ESTER.
Claim 2
Dependent Claim
143 words
AN ADHESIVE COMPOSITION HAVING A PLASTICITY NOT GREATER THAN ABOUT 4.0 MM. AND A COLD FLOW NOT GREATER THAN ABOUT 2.5 INCHES, COMPRISING A CROSS-LINKED ESTER OF A COPOLYMER COMPRISING ABOUT EQUIMOLECULAR PROPORTIONS OF MALEIC ANHYDRIDE AND AN ALKYL VINYL ETHER, THE ALKYL GROUP OF WHICH CONTAINS FROM 1 TO 8 CARBON ATOMS, SAID COPOLYMER HAVING AN INTRINSIC VISCOSITY IN THE RANGE FROM ABOUT 0.2 TO 2.0, ABOUT 65 TO 95 PERCENT OF THE POTENTIAL CARBOXY GROUPS IN SAID COPOLYMER BEING ESTERIFIED WITH AN ALIPHATIC PRIMARY MONOHYDRIC SATURATED ALCOHOL CONTAINING 6 TO 16 CARBON ATOMS, SAID ESTER BEING CROSS-LINKED WITH A POLYHYDRIC ALCOHOL OF WHICH ONLY THE HYDROXY GROUPS REACT WITH THE CARBOXY GROUPS OF THE COPOLYMER, SAID CROSS-LINKING BEING SUFFICIENT TO IMPART TO SAID ESTER A GEL CONTENT IN THE RANGE FROM ABOUT 10 TO 100 PERCENT BY WEIGHT OF THE ESTER.
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |