US2500449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of matter containing glycidyl ethers and oxalic acid
Assignee: Shell Development Co
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Filing: 1948-03-29
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Granted: 1950-03-14
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Expires: 1968-03-29
Abstract
No abstract record available.
Inventors
- 👤 Theodore F Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:07
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A COMPOSITION OF MATTER COMPRISING AN ETHER OF THE CLASS CONSISTING OF A GLYCIDYL ETHER OF A DIHYDRIC PHENOL AND A GLYCIDYL ETHER OF A POLYHYDRIC ALCOHOL, AND 5% TO 300% OF THE EQUIVALENT AMOUNT OF OXALIC ACID, SAID ETHER HAVING A 1,2EPOXY EQUIVALENCY GREATER THAN ONE AND CONTAINING NO OTHER REACTIVE FUNCTIONAL GROUPS THAN EPOXY AND HYDROXYL GROUPS.
Claim 2
Dependent Claim
59 words
A COMPOSITION OF MATTER COMPRISING AN ETHER OF THE CLASS CONSISTING OF A GLYCIDYL ETHER OF A DIHYDRIC PHENOL AND A GLYCIDYL ETHER OF A POLYHYDRIC ALCOHOL, AND 5% TO 300% OF THE EQUIVALENT AMOUNT OF OXALIC ACID, SAID ETHER HAVING A 1,2EPOXY EQUIVALENCY GREATER THAN ONE AND CONTAINING NO OTHER REACTIVE FUNCTIONAL GROUPS THAN EPOXY AND HYDROXYL GROUPS.
References Cited (Backward Citations)
US2324483A
Cited
US2399214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |