US3029208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polyurethane and process of preparing same
Assignee: Honeywell International Inc
•
Filing: 1959-07-03
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Granted: 1962-04-10
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Expires: 1979-07-03
Abstract
No abstract record available.
Inventors
- 👤 Khawam Antoine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4615
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR THE PRODUCTION OF DIMENSIONALLY STABLE, RIGID POLYURETHANE CELLULAR MATERIALS WHICH ARE NOT BRITTLE AND HAVE A TOUGH ELASTIC LAYER WHICH COMPRISES FIRST PRODUCING A POLYESTER BY REACTING A DICARBOXYLIC ACID WITH A MIXTURE OF POLYHYDRIC ALCOHOLS COMPRISING (1):
Claim 2
Dependent Claim
41 words
A PROCESS FOR THE PRODUCTION OF DIMENSIONALLY STABLE, RIGID POLYURETHANE CELLULAR MATERIALS WHICH ARE NOT BRITTLE AND HAVE A TOUGH ELASTIC LAYER WHICH COMPRISES FIRST PRODUCING A POLYESTER BY REACTING A DICARBOXYLIC ACID WITH A MIXTURE OF POLYHYDRIC ALCOHOLS COMPRISING (1):
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |