US2578690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerators for addendum type resins
Assignee: PPG Industries Inc
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Filing: 1949-10-04
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Granted: 1951-12-18
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Expires: 1969-10-04
Abstract
No abstract record available.
Inventors
- 👤 Howard L Gerhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:58
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METHOD OF A POLYMERIZATIUON WHICH COMPRISES ADDING TO A DIHYDRIC ALCOHOL ESTER OF AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID, A SMALL EFFECTIVE AMOUNT OF AN ALDEHYDE AMINE WHICH IS THE REACTION PRODUCT OF EQUIMOLAR AMOUNTS OF AN ALDEHYDE OF THE FORMULA RCHO, IN WHICH R IS A HYDROCARBON GROUP, AND A PRIMARY MONAMINE OF THE FORMULA R1NH2, IN WICH R1 IS A HYDROCARBON GROUP.
Claim 2
Independent Claim
64 words
A METHOD OF A POLYMERIZATIUON WHICH COMPRISES ADDING TO A DIHYDRIC ALCOHOL ESTER OF AN ALPHA, BETA-UNSATURATED DICARBOXYLIC ACID, A SMALL EFFECTIVE AMOUNT OF AN ALDEHYDE AMINE WHICH IS THE REACTION PRODUCT OF EQUIMOLAR AMOUNTS OF AN ALDEHYDE OF THE FORMULA RCHO, IN WHICH R IS A HYDROCARBON GROUP, AND A PRIMARY MONAMINE OF THE FORMULA R1NH2, IN WICH R1 IS A HYDROCARBON GROUP.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |