Patent US3728193A successfully refreshed from Google Patents.
US3728193A
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US
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Tertiarybutylstyrene/butadiene block copolymers as adhesives
Assignee: Dow Chemical Co
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Filing: 1970-10-12
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Granted: 1973-04-17
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Expires: 1990-10-12
Abstract
Abstract ADHESIVE COPOLYMERS OF TERTIARYBUTYLSTYRENE AND BUTADIENE WHICH SHOW HIGH ADHESIVE STRENGTH ARE POLYMERS WHICH CONTAIN 1 TO 50 WEIGHT PRCENT TERTIARYBUTYLSTYRENE, 99 TO 50 WEIGHT PERCENT BUTADIENE AND HAVE INHERENT VISCOSITIES OF FROM 0.5 TO 4 DECILITERS PER GRAM.
Inventors
- 👤 Keever L Mc
- 👤 W Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:01
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31855; Y10T428/31931
Claims Analysis
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |