US3277076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether polyol useful as intermediate in preparation of polyurethane foam
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1964-05-04
•
Granted: 1966-10-04
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Yotsuzuka Masaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A POLYETHER POLYOL, USEFUL IN THE PRODUCTION OF POLYURETHANE FOAM, PRODUCED BY SUBJECTING ALKYLENE OXIDE TO ADDITION POLYMERIZATION, EMPLOYING, AS AN INITIATOR, THE REACTION PRODUCT OF THE REACTION OF 3- TO 6-FUNCTIONAL POLYOL WITH A REDUCING MONO-SACCHARIDE UNDER ACIDIC CONDITIONS, SAID MONO-SACCHARIDE BEING SELECTED FROM THE GROUP CONSISTING OF GLUCOSE, INVERT SUGAR, WOOD SUGAR AND GALACTOSE.
Claim 2
Dependent Claim
56 words
A POLYETHER POLYOL, USEFUL IN THE PRODUCTION OF POLYURETHANE FOAM, PRODUCED BY SUBJECTING ALKYLENE OXIDE TO ADDITION POLYMERIZATION, EMPLOYING, AS AN INITIATOR, THE REACTION PRODUCT OF THE REACTION OF 3- TO 6-FUNCTIONAL POLYOL WITH A REDUCING MONO-SACCHARIDE UNDER ACIDIC CONDITIONS, SAID MONO-SACCHARIDE BEING SELECTED FROM THE GROUP CONSISTING OF GLUCOSE, INVERT SUGAR, WOOD SUGAR AND GALACTOSE.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |