US2541027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of matter containing epoxy ethers and phosphorus-containing compounds
Assignee: Shell Development Co
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Filing: 1948-05-11
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Granted: 1951-02-13
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Expires: 1968-05-11
Abstract
No abstract record available.
Inventors
- 👤 Theodore F Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:08
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08G59/1472; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08G59/1405; C08G59/1422; C08G59/1494; C08G59/18; C08G59/40; C08G59/4007; C08G59/4071
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
A HEAT-CURABLE COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF GLYCIDYL ETHER OF BIS-(4HYDROXYPHENYL) -2,2-PROPANE, HAVING A 1,2-EXPOXY EQUIVALENCY GREATER THAN ONE, IN ADMIXTURE WITH SUCH A PROPORTION OF ORTHOPHOSPHORIC ACID, H3PO4, THAT THERE IS PRESENT FROM 50% TO 150% OF THE EQUIVALENT AMOUNT OF SAID ACID PER EPOXY GROUP OF SAID ETHER.
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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |