US2950266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked polycarbonate resinous compositions and method for preparing same
Assignee: General Electric Co
•
Filing: 1957-08-22
•
Granted: 1960-08-23
•
Expires: 1977-08-22
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Goldblum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/426; C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/14; C08G64/18; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A HEAT-CURABLE RESINOUS COMPOSITION COMPRISING THE CONDENSATION PRODUCT OF (1) A LINEAR CARBONATE POLYMER PREPARED BY THE REACTION OF A DIHYDRIC PHENOL AND A CARBONATE PRECURSOR SELECTED FROM THE CLASS CONSISTING OF CARBONATE ESTERS, CARBONYL HALIDES AND HALOFORMATES, AND (2) NOT MORE THAN ABOUT 100%, BASED UPON THE WEIGHT OF (1), OF AN AROMATIC MATERIAL CONTAINING MORE THAN TWO HYDROXYL GROUPS, ALL OF THE HYDROXYL GROUPS BEING ATTACHED DIRECTLY TO PHENYL RINGS IN THE SAME MOLECULE.
Claim 2
Dependent Claim
76 words
A HEAT-CURABLE RESINOUS COMPOSITION COMPRISING THE CONDENSATION PRODUCT OF (1) A LINEAR CARBONATE POLYMER PREPARED BY THE REACTION OF A DIHYDRIC PHENOL AND A CARBONATE PRECURSOR SELECTED FROM THE CLASS CONSISTING OF CARBONATE ESTERS, CARBONYL HALIDES AND HALOFORMATES, AND (2) NOT MORE THAN ABOUT 100%, BASED UPON THE WEIGHT OF (1), OF AN AROMATIC MATERIAL CONTAINING MORE THAN TWO HYDROXYL GROUPS, ALL OF THE HYDROXYL GROUPS BEING ATTACHED DIRECTLY TO PHENYL RINGS IN THE SAME MOLECULE.
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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |