US3211674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam from hydroxylated tall oil
Assignee: Bayer Corp
•
Filing: 1961-08-22
•
Granted: 1965-10-12
•
Expires: 1981-08-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Sandridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A RIGID CELLULAR POLYURETHANE PLASTIC PREPARED BY A PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE OF A BLOWING AGENT, AN ORGANIC POLYISOCYANATE WITH TALL OIL WHICH HA BEEN HYDROXYLATED BY REACTON WITH AN OXIDIZING AGENT UNTIL IT HAS AN HYDROXYL NUMBER OF AT LEST ABOUT 50, SAID ORGANIC POLYISOCYANATE HAVING BEEN PREPARED BY A PROCESS WHICH COMPRISES PHOSGENATING THE REACTON PRODUCT OF ANILINE WITH FORMALDEHYDE.
Claim 2
Dependent Claim
65 words
A RIGID CELLULAR POLYURETHANE PLASTIC PREPARED BY A PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE OF A BLOWING AGENT, AN ORGANIC POLYISOCYANATE WITH TALL OIL WHICH HA BEEN HYDROXYLATED BY REACTON WITH AN OXIDIZING AGENT UNTIL IT HAS AN HYDROXYL NUMBER OF AT LEST ABOUT 50, SAID ORGANIC POLYISOCYANATE HAVING BEEN PREPARED BY A PROCESS WHICH COMPRISES PHOSGENATING THE REACTON PRODUCT OF ANILINE WITH FORMALDEHYDE.
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |