Patent US2926188A successfully refreshed from Google Patents.
US2926188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing alpha-cyanoacrylates
Assignee: Rohm and Haas Co
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Filing: 1957-05-06
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Granted: 1960-02-23
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Charles H Mckeever
- 👤 Harry R Raterink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:31
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR PREPARING STABLE MONOMERIC LOWER ALKYL A-CYANOACRYLATES EMPLOYING SUBSTANTIALLY ANHYDROUS CONDITIONS THROUGHOUT WHICH COMPRISES REACTING SUBSTANTIALLY TWO MOLECULAR EQUIVALENTS OF LOWER ALKYL CYANOACETATE WITH SUBSTANTIALLY ONE MOLECULAR EQUIVALENT OF FROMALDEHYDE, SAID CYANOACETATE ALWAYS BEING PRESENT IN THE REACTION MEDIUM IN AT LEAST A 2 TO 1 MOLECULAR RATIO WITH RESPECT TO SAID FORMALDEHYDE, HEATING THE RESULTING COMPOUND AT ABOUT 150* TO 210*C. AT ABOUT 4 TO 50 MM. ABSOLUTE PRESSURE WHEREBY LOWER ALKYL A-CYANOACRYLATE AND ALKYL CYANOACETATE ARE FORMED AND COLLECTING THE LOWER ALKYL A-CYANOACRYLATE, IN WHICH SAID ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS.
Claim 2
Dependent Claim
99 words
A PROCESS FOR PREPARING STABLE MONOMERIC LOWER ALKYL A-CYANOACRYLATES EMPLOYING SUBSTANTIALLY ANHYDROUS CONDITIONS THROUGHOUT WHICH COMPRISES REACTING SUBSTANTIALLY TWO MOLECULAR EQUIVALENTS OF LOWER ALKYL CYANOACETATE WITH SUBSTANTIALLY ONE MOLECULAR EQUIVALENT OF FROMALDEHYDE, SAID CYANOACETATE ALWAYS BEING PRESENT IN THE REACTION MEDIUM IN AT LEAST A 2 TO 1 MOLECULAR RATIO WITH RESPECT TO SAID FORMALDEHYDE, HEATING THE RESULTING COMPOUND AT ABOUT 150* TO 210*C. AT ABOUT 4 TO 50 MM. ABSOLUTE PRESSURE WHEREBY LOWER ALKYL A-CYANOACRYLATE AND ALKYL CYANOACETATE ARE FORMED AND COLLECTING THE LOWER ALKYL A-CYANOACRYLATE, IN WHICH SAID ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS.
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) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |