Patent US2784522A successfully refreshed from Google Patents.
US3264233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes from halogenated branch polyethers
Assignee: Bayer AG
•
Filing: 1963-03-20
•
Granted: 1966-08-02
•
Expires: 1983-03-20
Abstract
No abstract record available.
Inventors
- 👤 Trescher Viktor
- 👤 Braun Gunther
- 👤 Dahm Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5075; C08G18/5081; C08G18/5084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A POLYURETHANE PLASTIC PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH A POLYHYDRIC POLYALKYLENE ETHER CONTAINING AT LEAST ONE
Claim 2
Dependent Claim
22 words
A POLYURETHANE PLASTIC PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH A POLYHYDRIC POLYALKYLENE ETHER CONTAINING AT LEAST ONE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |