US3640977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymers prepared from vinyl toluene alpha methyl styrene dicyclopentadiene and optionally an acrylic compound
Assignee: SI Group Inc
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Filing: 1969-05-06
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Granted: 1972-02-08
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Expires: 1989-05-06
Abstract
Abstract TERPOLYMERS ARE MADE FROM VINYL TOLUENE, ALPHA METHYL STYRENE AND DICYCLOPENTADIENE AND TETRAPOLYMERS FROM THESE MATERIALS AND ACRYLIC ACID OR METHACRYLIC ACID OR AN ALKYL ESTER OF SUCH ACIDS. THE PREFERRED POLYMERS ARE TETRAPOLYMERS INCLUDING BUTYL ACRYLATE. THE POLYMERS ARE USEFUL AS HOT MELT ADHESIVES AND HOT MELT COATINGS.
Inventors
- 👤 Carlos T Gonzenbach
- 👤 Manuel A Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:07
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |