Patent US2852477A successfully refreshed from Google Patents.
US2852477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of polyamides and polyepoxide polyesters
Assignee: SC Johnson and Son Inc
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Filing: 1955-06-29
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Granted: 1958-09-16
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Expires: 1975-06-29
Abstract
No abstract record available.
Inventors
- 👤 Sylvan O Greenlee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:01
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A REACTION MIXTURE FOR FORMING COMPLEX REACTION PRODUCTS COMPRISING A POLYAMIDE OF DIBASIC ACIDS HAVING AT LEAST ABOUT 22 CARBON ATOMS AND AN ALIPHATIC DIAMINE CONTAINING AT LEAST ONE ACTIVE HYDROCARBON ATOM ATTACHED TO EACH AMINO NITROGEN, AND A POLYEPOXIDE POLYESTER OF TETRAHYDROPHTHALIC ACID AND A GLYCOL FREE FROM AROMATIC GROUPS, SAID POLYESTER CONTAINING EPOXY OXYGEN BRIDGING ADJACENT CARBON ATOMS ON THE TETRAHYDROPHTHALIC ACID RESIDUE, THE RATIO OF EPOXIDE GROUPS PRESENT IN SAID POLYEPOXIDE POLYESTER TO ACTIVE HYDROGEN PRESENT IN SAID POLYAMIDE RANGING FROM 5:1 TO 1:5.
Claim 2
Dependent Claim
87 words
A REACTION MIXTURE FOR FORMING COMPLEX REACTION PRODUCTS COMPRISING A POLYAMIDE OF DIBASIC ACIDS HAVING AT LEAST ABOUT 22 CARBON ATOMS AND AN ALIPHATIC DIAMINE CONTAINING AT LEAST ONE ACTIVE HYDROCARBON ATOM ATTACHED TO EACH AMINO NITROGEN, AND A POLYEPOXIDE POLYESTER OF TETRAHYDROPHTHALIC ACID AND A GLYCOL FREE FROM AROMATIC GROUPS, SAID POLYESTER CONTAINING EPOXY OXYGEN BRIDGING ADJACENT CARBON ATOMS ON THE TETRAHYDROPHTHALIC ACID RESIDUE, THE RATIO OF EPOXIDE GROUPS PRESENT IN SAID POLYEPOXIDE POLYESTER TO ACTIVE HYDROGEN PRESENT IN SAID POLYAMIDE RANGING FROM 5:1 TO 1:5.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |