US3658762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of noncellular polyurethane compositions
Assignee: Honeywell International Inc
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Filing: 1970-05-28
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Granted: 1972-04-25
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Expires: 1990-05-28
Abstract
Abstract IMPROVED PREPARATION OF NONCELLULAR POLYURETHANES BY LIQUID PHASE REACTION OF AN ORGANIC POLYISOCYANATE AND ORGANIC POLYOL IN THE PRESENCE OF A MERCURIC CARBOXYLIC ACID SALT WHICH IS DEVOID OF MERCURY BOUND DIRECTLY TO CARBON AND WHICH IS PROMOTED BY A BASIC PLUMBOUS SALT OF A NEOACID. THE IMPROVED PROCESS PROVIDES POLYURETHANES INCORPORATING THE PROMOTED CATALYST WHICH ARE STABLE TO HOT WATER AND ARE USEFUL AS COATINGS, CAULKS AND SEALANTS FOR CLOTH, LEATHER, PAPER AND CERAMICS.
Inventors
- 👤 David Stanley Cobbledick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/26; C08G18/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |