Patent US3022256A successfully refreshed from Google Patents.
US3022256A
Expired / Lapsed
US
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Polyurethane foam and method of preparing same
Assignee: Union Carbide Corp
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Filing: 1959-08-10
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Granted: 1962-02-20
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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 17:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A FOAMED POLYMER COMPRISING A NETWORK OF ISOCYANATE-MODIFIED HYDROXPOLYALKYLENEOXY EHTERS IF SUBSTITUTUED TETRAHYDROPYRANS IN WHICH SAID WTHERS ARE CONNECTED TO ORGANIC POLYISOCYANATE RESIDUES BY MEANS OF URETHANE GROUPS, SAID ETHERS HAVING THE CORMULA:
Claim 2
Dependent Claim
33 words
A FOAMED POLYMER COMPRISING A NETWORK OF ISOCYANATE-MODIFIED HYDROXPOLYALKYLENEOXY EHTERS IF SUBSTITUTUED TETRAHYDROPYRANS IN WHICH SAID WTHERS ARE CONNECTED TO ORGANIC POLYISOCYANATE RESIDUES BY MEANS OF URETHANE GROUPS, SAID ETHERS HAVING THE CORMULA:
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |