Patent US3970597A successfully refreshed from Google Patents.
US3723170A
Expired / Lapsed
US
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Pressure-sensitive adhesive tape
Assignee: Permacel
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Filing: 1969-12-05
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Granted: 1973-03-27
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Expires: 1989-12-05
Abstract
Abstract A PRESSURE-SENSITIVE ADHENXIVE TAPE WITH IMPROVED PROPERTIES AT ELEVATED TEMPERATURE WITHIN THE RANGE OF ABOUT 212*-280*F. THIS TAPE IS BASED ON AN ADHENSIVE WHEREIN A MAJOR PROPORTION BY WEIGHT OF THE ELASTOMERS IS AN ELASTOMERIC AND THERMOPLASTIC BLOCK POLYMER OF THE STRUCTURE ABA, WHEREIN A IS A THERMOPLASTIC POLYMER BLOCK OF STYRENE POSSESSING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 12,000-30,000, AND B IS AN ELASTOMERIC POLYMER BLOCK OF ISOPRENE POSSESSING A NUMBER AVERAGE MOLECULAR WEIGHT OF AT LEAST ABOUT 100,000, AND WHEREIN THE STYRENE A BLOCKS COMPOSE ABOUT 10-35 PERCENT BY WEIGHT OF THE BLOCK POLYMER.
Inventors
- 👤 R Korpman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:47
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/387; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2883
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |