US3039976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam and preparation of same
Assignee: Union Carbide Corp
•
Filing: 1959-08-10
•
Granted: 1962-06-19
•
Expires: 1979-08-10
Abstract
No abstract record available.
Inventors
- 👤 Robert K Barnes
- 👤 Robert W Mclaughlin
- 👤 Hostettler Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4875
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A FOAMED POLYMER COMPRISING A NETWORK OF ISOCYANATE-MODIFIED HYDROXYPOLYALKYLENOXY ETHERS OF TETRAMETHYLOLCYCLOHEXANOL IN WHICH SAID ETHERS ARE CONNECTED TO ORGANIC POLYISOCYANATE RESIDUES BY MEANS OF URETHANE GROUPS, SAID ETHERS HAVING THE FORMULA:
Claim 2
Dependent Claim
32 words
A FOAMED POLYMER COMPRISING A NETWORK OF ISOCYANATE-MODIFIED HYDROXYPOLYALKYLENOXY ETHERS OF TETRAMETHYLOLCYCLOHEXANOL IN WHICH SAID ETHERS ARE CONNECTED TO ORGANIC POLYISOCYANATE RESIDUES BY MEANS OF URETHANE GROUPS, SAID ETHERS HAVING THE FORMULA:
References Cited (Backward Citations)
US2866774A
Cited
US2843568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |