US3058955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plastics
Assignee: Bayer AG
•
Filing: 1960-07-13
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Granted: 1962-10-16
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Expires: 1980-07-13
Abstract
No abstract record available.
Inventors
- 👤 Neumann Wolfram
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR THE PREPARATION OF POLYURETHANE PLASTICS WHICH ARE SUBSTANTIALLY INSENSITIVE TO THE ACTION OF LIGHT WHICH COMPRISES REACTING 1,3-DIISOPROPYL BENZENE4,6-DIISOCYANATE WITH AN ORGANIC COMPOUND CONTAINING AT LEAST TWO ACTIVE HYDROGEN CONTAINING GROUPS AS DETERMINED BY THE ZEREWITINOFF METHOD AND HAVING A MOLECULAR WEIGHT ABOVE ABOUT 500.
Claim 2
Dependent Claim
48 words
A PROCESS FOR THE PREPARATION OF POLYURETHANE PLASTICS WHICH ARE SUBSTANTIALLY INSENSITIVE TO THE ACTION OF LIGHT WHICH COMPRISES REACTING 1,3-DIISOPROPYL BENZENE4,6-DIISOCYANATE WITH AN ORGANIC COMPOUND CONTAINING AT LEAST TWO ACTIVE HYDROGEN CONTAINING GROUPS AS DETERMINED BY THE ZEREWITINOFF METHOD AND HAVING A MOLECULAR WEIGHT ABOVE ABOUT 500.
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) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |