US3645927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane catalyst
Assignee: Bayer AG
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Filing: 1969-05-13
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Granted: 1972-02-29
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Expires: 1989-05-13
Abstract
Abstract A CATALYST IS PROVIDED FOR THE PRODUCTION OF URETHANECONTAINING POLYMERS BY THE REACTION BETWEEN AN ORGANIC POLYHYDROXY COMPOUND AND AN ORGANIC POLYISOYANATE IN THE PRESENCE OF A BLOWING AGENT WHEREIN DI-N-OCTYL TIN MERCAPTIDE IS USED AS THE ACTIVATOR FOR THE ISOCYANATE HYDROXYL HYDROGEN REACTION.
Inventors
- 👤 Karlheinz Andres
- 👤 Franz Karl Brochhagen
- 👤 Anton Wunderer
- 👤 Josef Fulber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:17
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/161; C08G18/163; C08G18/165
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |