US2839478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular carbon monoxide-olefine copolymer-polysocyanate products and process of producing same
Assignee: Bayer AG
•
Filing: 1955-01-18
•
Granted: 1958-06-17
•
Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 Wilms Hugo
- 👤 Bayer Otto
- 👤 Bunge Wilhelm
- 👤 Bruns Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6204; C08G2110/00; C08G2110/0083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR MAKING FOAMED PLASTICS WHICH COMPRISES REACTING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF WATER AND A NEUTRAL CARBON MONOXIDE-OLEFINE COPOLYMER HAVING TERMINAL HYDROXYL GROUPS, WATER AND A CARBON MONOXIDE-OLEFINE COPOLYMER HAVING TERMINAL HYDROXYL AND CARBOXYL GROUPS AND AN ACID NUMBER OF NOT MORE THAN 30, AND A CARBON MONOXIDE-OLEFIN COPOLYMER HAVING TERMINAL HYDROXYL AND CARBOXYL GROUPS AND AN ACID NUMBER OF MORE THAN 30 WITH AN ORGANIC POLYISOCYANATE HAVING NCO GROUPS IN AN AMOUNT AT LEAST EQUIVALENT TO THE SUM OF THE HYDROXYL GROUPS, CARBOXYL GROUPS AND WATER IN SAID COMPOSITION, SAID OLEFINE HAVING FROM 2 TO 4 CARBON ATOMS.
Claim 2
Independent Claim
104 words
A METHOD FOR MAKING FOAMED PLASTICS WHICH COMPRISES REACTING A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF WATER AND A NEUTRAL CARBON MONOXIDE-OLEFINE COPOLYMER HAVING TERMINAL HYDROXYL GROUPS, WATER AND A CARBON MONOXIDE-OLEFINE COPOLYMER HAVING TERMINAL HYDROXYL AND CARBOXYL GROUPS AND AN ACID NUMBER OF NOT MORE THAN 30, AND A CARBON MONOXIDE-OLEFIN COPOLYMER HAVING TERMINAL HYDROXYL AND CARBOXYL GROUPS AND AN ACID NUMBER OF MORE THAN 30 WITH AN ORGANIC POLYISOCYANATE HAVING NCO GROUPS IN AN AMOUNT AT LEAST EQUIVALENT TO THE SUM OF THE HYDROXYL GROUPS, CARBOXYL GROUPS AND WATER IN SAID COMPOSITION, SAID OLEFINE HAVING FROM 2 TO 4 CARBON ATOMS.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |