Patent US4579213A successfully refreshed from Google Patents.
Patent US3280049A successfully refreshed from Google Patents.
US3280049A
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Premixes for polyurethane foams
Assignee: Union Carbide Corp
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Filing: 1963-11-29
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Granted: 1966-10-18
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 John E Hyre
- 👤 Friso G Willeboordse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PREMIX COMPOSITION USEFUL IN THE PREPARATION OF POLYURETHANE FOAMS WHICH COMPRISES A POLYOXYALKYLENE POLYOL, A STANNOUS SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF MONOCARBOXYLIC ACIDS AND AMINOMONOCARBOXYLIC ACIDS AND A SMALL AMOUNT OF 2,2''-METHYLENE BIS(4-METHLY-6-TERTIARYBUTYLPHENOL) SUFFICIENT TO INHIBIT THE OXIDATION OF THE STANNOUS SALT OF THE STANNIC STATE.
Claim 2
Dependent Claim
52 words
A PREMIX COMPOSITION USEFUL IN THE PREPARATION OF POLYURETHANE FOAMS WHICH COMPRISES A POLYOXYALKYLENE POLYOL, A STANNOUS SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF MONOCARBOXYLIC ACIDS AND AMINOMONOCARBOXYLIC ACIDS AND A SMALL AMOUNT OF 2,2''-METHYLENE BIS(4-METHLY-6-TERTIARYBUTYLPHENOL) SUFFICIENT TO INHIBIT THE OXIDATION OF THE STANNOUS SALT OF THE STANNIC STATE.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |