US3684639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealing textile sheets with polyurethane heat sealing adhesives
Assignee: Bayer AG
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Filing: 1970-06-09
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Granted: 1972-08-15
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Expires: 1990-06-09
Abstract
Abstract TEXTILE SHEETS ARE HEAT SEALED USING POLYURETHANE HEAT SEALING ADHESIVES OBTAINED FROM ALIPHATIC ISOCYANATES AND GLYCOLS HAVING ALIPHATICALLY BOUND HYDROXYL GROUPS AND A MOLECULAR WEIGHT OF UP TO 400 AND 0.1 TO 50 PERCENT BY WEIGHT, BASED UPON THE WEIGHT OF THE POLYURETHANE, OF A POLYHYDROXYL COMPOUND HAVING AT LEAST 2 ALIPHATIC HYDROXYL GROUPS AND A MOLECULAR WEIGHT OF UP TO 2500.
Inventors
- 👤 Wolfgang Keberle
- 👤 Hellmut Striegler
- 👤 Karl-Arnold Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/6505; C08G18/6511; B; B32; B32B; B32B37/00; B32B37/12; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; C08G18/6517; C09; C09J; C09J175/00; C09J175/04; D; D06; D06M; D06M17/00; D06M17/04; D06M17/10; C08G2170/00; C08G2170/20; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/261; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3602; Y10T442/3667; Y10T442/3675; Y10T442/40; Y10T442/488; Y10T442/60; Y10T442/659
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |