US3330781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane plastics prepared from alkylene oxide adducts of compositions comprising a major portion of trihydroxydiphenyl
Assignee: Bayer Corp
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Filing: 1962-05-07
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Granted: 1967-07-11
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Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 Paul G Gemeinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:25
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4879
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
75 words
A POLYURETHANE COMPRISING THE REACTION PRODUCT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC POLYISOCYANATES AND POLYISOTHIOCYANATES AND A POLYETHER-TYPE RESIN COMPRISING THE REATIONS PRODUCT OF (A) AN ALKYLENE OXIDE HAVING 2 TO 6 CARBON ATOMS AND (B) A SOLID RESINOUS MATERIAL COMPRISING A RESIDUE REMAINING IN THE STILL AFTER REMOVING TECHNICAL GRADE RESORCINOL AS A DISTILLATE, SAID SOLID RESINOUS MATERIAL BEING A DARK BROWN BRITTLE MATERIAL HAVING THE FOLLOWING CHARACTERISTICS:
Claim 2
Dependent Claim
75 words
A POLYURETHANE COMPRISING THE REACTION PRODUCT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC POLYISOCYANATES AND POLYISOTHIOCYANATES AND A POLYETHER-TYPE RESIN COMPRISING THE REATIONS PRODUCT OF (A) AN ALKYLENE OXIDE HAVING 2 TO 6 CARBON ATOMS AND (B) A SOLID RESINOUS MATERIAL COMPRISING A RESIDUE REMAINING IN THE STILL AFTER REMOVING TECHNICAL GRADE RESORCINOL AS A DISTILLATE, SAID SOLID RESINOUS MATERIAL BEING A DARK BROWN BRITTLE MATERIAL HAVING THE FOLLOWING CHARACTERISTICS:
Claim 3
Dependent Claim
53 words
A POLYHYDRIC POLYETHER COMPRISING THE REATION PRODUCT OF (A) AN ALKYLENE OXIDE HAVING 2 TO 6 CARBON ATOMS AND (B) A SOLID RESINOUS MATERIAL COMPRISING A RESIDUE REMAINING IN THE STILL AFTER REMOVING TECHNICAL GRADE RESORCINOL AS A DISTILLATE, SAID SOLID RESINOUS MATERIAL BEING A DARK BROWN, BRITTLE MATERIAL HAVING THE FOLLOWING CHARACTERISTICS:
Claim 4
Dependent Claim
53 words
A POLYHYDRIC POLYETHER COMPRISING THE REATION PRODUCT OF (A) AN ALKYLENE OXIDE HAVING 2 TO 6 CARBON ATOMS AND (B) A SOLID RESINOUS MATERIAL COMPRISING A RESIDUE REMAINING IN THE STILL AFTER REMOVING TECHNICAL GRADE RESORCINOL AS A DISTILLATE, SAID SOLID RESINOUS MATERIAL BEING A DARK BROWN, BRITTLE MATERIAL HAVING THE FOLLOWING CHARACTERISTICS:
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |