US3043801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prepolymer comprising the reaction product of a polyisocyanate, a polyalkylene etherpolyalcohol and an amine or phenol, reaction product thereof with formaldehyde, and process for preparing same
Assignee: Bayer AG
•
Filing: 1958-12-31
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Granted: 1962-07-10
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Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Wagner Kuno
- 👤 Muller Erwin
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/84; C08G18/08; C08G18/10; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G2380/00; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE PREPARATION OF A CROSS-LINKED POLYURETHANE PLASTIC WHICH COMPRISES REACTING A PREPOLYMER OBTAINED FROM AN ORGANIC POLYISOCYANATE, A POLYALKYLENE ETHER POLYALCOHOL CONTAINING ETHER BRIDGES SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR ETHER BRIDGES, AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXY-ALKYLATED AROMATIC AMINES AND HYDROXY-ALKYLATED PHENOLS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND PRECURSORS THEREOF.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE PREPARATION OF A CROSS-LINKED POLYURETHANE PLASTIC WHICH COMPRISES REACTING A PREPOLYMER OBTAINED FROM AN ORGANIC POLYISOCYANATE, A POLYALKYLENE ETHER POLYALCOHOL CONTAINING ETHER BRIDGES SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR ETHER BRIDGES, AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXY-ALKYLATED AROMATIC AMINES AND HYDROXY-ALKYLATED PHENOLS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND PRECURSORS THEREOF.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |