US3784502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block copolymer compositions
Assignee: 3M Co
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Filing: 1971-11-10
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Granted: 1974-01-08
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Expires: 1991-11-10
Abstract
Abstract ADHESIVES, INKS, PRIMERS, ETC., IN WHICH TACKIFYING RESINS ARE COMBINED WITH CERTAIN POLY ALPHA-OLEFIN BLOCK POLYMERS, HAVE EXCELLENT SPECIFIC ADHESION TO LOW ENGERY SURFACES SUCH AS POLYETHYLENE AND POLYPROPYLENE AS WELL AS TO SUCH OTHER SURFACES AS METAL, WOOD, PLASTICS, GLASS AND RUBBER. THE POLYMER IS A BLOCK ALPHA-OLEFIN WHICH HAS THE GENERAL FORMULA A-(B-A)N WHEREIN A BLOCKS ARE AT LEAST CAPABLE OF CRYSTALLIZATION AND B BLOCKS ARE SUBSTANTIALY AMORPHOUS.
Inventors
- 👤 R Gobran
- 👤 L Kremer
- 👤 D Ethier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:08
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C09; C09J; C09J153/00; C08L; C08L2666/00; C08L2666/02
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |