US3334154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant mixed polycarbonate resins prepared from tetrabromo bisphenol-a
Assignee: General Electric Co
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Filing: 1966-02-28
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Granted: 1967-08-01
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 James K S Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:59
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G64/10; C08L; C08L69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A MOLDABLE FLAME-RESISTANT POLYCARBONATE RESIN MIXTURE CONSISTING OF (1) 70-99 WEIGHT PERCENT OF A POLYCARBONATE RESIN OF A DIHYDRIC PHENOL, AND, CORRESPONDINGLY, (2) 30-1.0 WEIGHT PERCENT OF A CARBONATE COPOLYMER BASED ON THE TOTAL WEIGHT OF THE POLYCARBONATE RESIN MIXTURE; SAID CARBONATE COPOLYMER CONSISTING OF 45-25 WEIGHT PERCENT OF TETRABROMOBISPHENOL-A AND, CORRESPONDINGLY, 5575 WEIGHT PERCENT BASED ON THE WEIGHT OF THE COPOLYMER OF ANOTHER COMPOUND SELECTED FROM THE GROUP CONSISTING OF A DIHYDRIC PHENOL, A GLYCOL AND A DICARBOXYLIC ACID, AND MIXTURES THEREOF, AND WHEREIN SAID COPOLYMER HAS AN INTRINSIC VISCOSITY OF 0.2-0.7.
Claim 2
Dependent Claim
93 words
A MOLDABLE FLAME-RESISTANT POLYCARBONATE RESIN MIXTURE CONSISTING OF (1) 70-99 WEIGHT PERCENT OF A POLYCARBONATE RESIN OF A DIHYDRIC PHENOL, AND, CORRESPONDINGLY, (2) 30-1.0 WEIGHT PERCENT OF A CARBONATE COPOLYMER BASED ON THE TOTAL WEIGHT OF THE POLYCARBONATE RESIN MIXTURE; SAID CARBONATE COPOLYMER CONSISTING OF 45-25 WEIGHT PERCENT OF TETRABROMOBISPHENOL-A AND, CORRESPONDINGLY, 5575 WEIGHT PERCENT BASED ON THE WEIGHT OF THE COPOLYMER OF ANOTHER COMPOUND SELECTED FROM THE GROUP CONSISTING OF A DIHYDRIC PHENOL, A GLYCOL AND A DICARBOXYLIC ACID, AND MIXTURES THEREOF, AND WHEREIN SAID COPOLYMER HAS AN INTRINSIC VISCOSITY OF 0.2-0.7.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |