Patent US2221105A successfully refreshed from Google Patents.
US2769826A
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Isocyanate-castor oil metal cement
Assignee: Stoner-Mudge Inc
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Filing: 1953-09-28
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Granted: 1956-11-06
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Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Clayton W Yoho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36; C09; C09J; C09J175/00; C09J175/04; C08G2390/00; Y; Y10; Y10S; Y10S528/00; Y10S528/905; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS OF PREPARING A POLYMERIC CEMENT OF SUITABLE VISCOSITY, COMPRISING THE STEPS OF PREPARING A FIRST PREPOLYMER IN WHICH THE REACTANTS CONSIST OF 5.5 TO 11 PARTS OF METHYLENE BIS-(4-PHENYL ISOCYANATE) AND 72 PARTS OF CASTOR OIL, AND A SECOND PREPOLYMER IN WHICH THE REACTANTS CONSIST OF 10 TO 28 PARTS OF METHYLENE BIS-(4-PHENYL ISOCYANATELY) AND 10 PARTS OF CASTOR OIL, SAID PREPOLYMERS EACH HAVING A STABLE VISCOSITY IN THE RANGE OF 5000 TO 100,000 CENTIPOISES AT 80* F., AND SUBSEQUENTLY MIXING THE SAID PREPOLYMERS IN SUCH PROPORTIONS THAT THE TOTAL MIXTURE HAS A METHYLENE BIS-(4-PHENYL ISOCYANATE) AND CASTOR OIL CONTENT IN SUBSEQUENTLY STOICHIOMETRIC PROPORTIONS.
Claim 2
Dependent Claim
106 words
A PROCESS OF PREPARING A POLYMERIC CEMENT OF SUITABLE VISCOSITY, COMPRISING THE STEPS OF PREPARING A FIRST PREPOLYMER IN WHICH THE REACTANTS CONSIST OF 5.5 TO 11 PARTS OF METHYLENE BIS-(4-PHENYL ISOCYANATE) AND 72 PARTS OF CASTOR OIL, AND A SECOND PREPOLYMER IN WHICH THE REACTANTS CONSIST OF 10 TO 28 PARTS OF METHYLENE BIS-(4-PHENYL ISOCYANATELY) AND 10 PARTS OF CASTOR OIL, SAID PREPOLYMERS EACH HAVING A STABLE VISCOSITY IN THE RANGE OF 5000 TO 100,000 CENTIPOISES AT 80* F., AND SUBSEQUENTLY MIXING THE SAID PREPOLYMERS IN SUCH PROPORTIONS THAT THE TOTAL MIXTURE HAS A METHYLENE BIS-(4-PHENYL ISOCYANATE) AND CASTOR OIL CONTENT IN SUBSEQUENTLY STOICHIOMETRIC PROPORTIONS.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |