Patent US2987504A successfully refreshed from Google Patents.
US2987504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane rubber via storable intermediates
Assignee: Bayer AG
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Filing: 1957-06-05
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Granted: 1961-06-06
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Expires: 1977-06-05
Abstract
No abstract record available.
Inventors
- 👤 Wagner Kuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/08; C08G18/10; C08G18/12; C08G18/65; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/80; C08G18/8003; C08G18/8045; C08G18/8054; C08G18/8058; Y; Y10; Y10S; Y10S273/00; Y10S273/08; Y10S528/00; Y10S528/903; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A COMPOSITION CAPABLE OF FORMING A RUBBER-LIKE POLYURETHANE PLASTIC COMPRISING (A) A LINEAR POLYURETHANE POLYMER OBTAINED FROM AN ORGANIC DIISOCYANATE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXYL POLYESTERS OBTAINED FROM A DICARBOXYLIC ACID AND A GLYCOL AND POLY(ALKYLENE ETHER) GLYCOLS AND HAVING REACTIVE GROUPS SELECTED FROM THE CLASS CONSISTING OF ALCOHOLIC HYDROXYL GROUPS AND PRIMARY AMINO GROUPS AS THE SOLE GROUPS THEREOF REACTIVE WITH -NCO GROUPS AND (B) A MIXTURE OF AT LEAST ABOUT 45 PERCENT BY WEIGHT OF UREA DIISOCYANATE HAVING THE FORMULA
Claim 2
Dependent Claim
87 words
A COMPOSITION CAPABLE OF FORMING A RUBBER-LIKE POLYURETHANE PLASTIC COMPRISING (A) A LINEAR POLYURETHANE POLYMER OBTAINED FROM AN ORGANIC DIISOCYANATE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXYL POLYESTERS OBTAINED FROM A DICARBOXYLIC ACID AND A GLYCOL AND POLY(ALKYLENE ETHER) GLYCOLS AND HAVING REACTIVE GROUPS SELECTED FROM THE CLASS CONSISTING OF ALCOHOLIC HYDROXYL GROUPS AND PRIMARY AMINO GROUPS AS THE SOLE GROUPS THEREOF REACTIVE WITH -NCO GROUPS AND (B) A MIXTURE OF AT LEAST ABOUT 45 PERCENT BY WEIGHT OF UREA DIISOCYANATE HAVING THE FORMULA
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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |