Patent US4576605A successfully refreshed from Google Patents.
Patent US3165483A successfully refreshed from Google Patents.
US3165483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skeletal polyurethane foam and method of making same
Assignee: Bayer Corp
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Filing: 1961-02-23
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Granted: 1965-01-12
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Expires: 1981-02-23
Abstract
No abstract record available.
Inventors
- 👤 Paul G Gemeinhardt
- 👤 Stanley A Bingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36; C08G18/40; C08G18/48; C08K; C08K5/00; C08K5/01; C08K5/02; C08K5/04; C08K5/07; C08K5/09; C08L; C08L75/00; C08L75/04; C08L83/00; C08L83/04; C08G2110/00; C08G2110/0041; C08G2110/005; C08G2110/0083; C08G2340/00; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD OF MAKING A SKELETAL CELLULAR POLYURETHANE PLASTIC WHICH COMPRISES REACTING (A) AN ORGANIC POLYISOCYANATE WITH (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL AND A POLYHYDRIC POLYALKYLENE ETHER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 285, IN THE PRESENCE OF A BLOWING AGENT, AN ALKYL SILANE OXYALKYLENE BLOCK COPOLYMER AND FROM ABOUT 10 TO ABOUT 40 PARTS PER HUNDRED PARTS OF (B) OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS HAVING FROM 7 TO 70 CARBON ATOMS, HALOGEN SUBSTITUTED HYDROCARBONS HAVING FROM 7 TO 70 CARBON ATOMS, ESTERS OF EQUIVALENT AMOUNTS OF CARBOXYLIC ACIDS AND ALCOHOLS BASED ON THE -OH AND -COOH GROUPS, ALDEHYDES HAVING FROM 4 TO 18 CARBON ATOMS AND KETONES HAVING FROM 5 TO 18 CARBON ATOMS, SAID ADDITIVE HAVING A BOILING POINT OF AT LEAST ABOUT 100* C. AND BEING FREE OF GROUPS WHICH ARE REACTIVE WITH AN ORGANIC POLYISOCYANATE.
Claim 2
Independent Claim
152 words
THE METHOD OF MAKING A SKELETAL CELLULAR POLYURETHANE PLASTIC WHICH COMPRISES REACTING (A) AN ORGANIC POLYISOCYANATE WITH (B) A MEMBER SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL AND A POLYHYDRIC POLYALKYLENE ETHER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 285, IN THE PRESENCE OF A BLOWING AGENT, AN ALKYL SILANE OXYALKYLENE BLOCK COPOLYMER AND FROM ABOUT 10 TO ABOUT 40 PARTS PER HUNDRED PARTS OF (B) OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS HAVING FROM 7 TO 70 CARBON ATOMS, HALOGEN SUBSTITUTED HYDROCARBONS HAVING FROM 7 TO 70 CARBON ATOMS, ESTERS OF EQUIVALENT AMOUNTS OF CARBOXYLIC ACIDS AND ALCOHOLS BASED ON THE -OH AND -COOH GROUPS, ALDEHYDES HAVING FROM 4 TO 18 CARBON ATOMS AND KETONES HAVING FROM 5 TO 18 CARBON ATOMS, SAID ADDITIVE HAVING A BOILING POINT OF AT LEAST ABOUT 100* C. AND BEING FREE OF GROUPS WHICH ARE REACTIVE WITH AN ORGANIC POLYISOCYANATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |