Patent US3654239A successfully refreshed from Google Patents.
US3654239A
Expired / Lapsed
US
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Process for the preparation of poly-(alpha-cyanoacrylates)
Assignee: Permabond International Corp
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Filing: 1970-11-20
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Granted: 1972-04-04
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Expires: 1990-11-20
Abstract
Abstract PROCESS FOR PREPARING A POLY(A-CYANOACRYLATE) COMPRISING POLYMERIZING A MONOMER EMPLOYING A FREE RADICAL OR ANIONIC CATALYST AND USING A SOLVENT HAVING A SOLUBILITY PARAMETER OF ABOUT 6.9 TO ABOUT 9.0 AND DIELECTRIC CONSTANT OF LESS THAN ABOUT 10, WHEREBY THE POLYMER SEPARATES FROM THE SOLVENT DURING POLYMERIZATION. THESE POLY(A-CYANOACRYLATES) ARE USEFUL AS VISCOSITY MODIFIERS IN A-CYANOACRYLATE ADHESIVE COMPOSITIONS.
Inventors
- 👤 John M Mcintire
- 👤 Thomas H Wicker Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:28
CPC Classifications
C; C09; C09J; C09J4/00; C09J4/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |