Patent US3236916A successfully refreshed from Google Patents.
US3236916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame resistant unsaturated polyesters of the diels-alder adduct of hexachlorocyclopentadiene and an unsaturated glycidyl ether
Assignee: Chemische Werke Witten GmbH
•
Filing: 1962-12-03
•
Granted: 1966-02-22
•
Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Wulff Helmut
- 👤 Behnke Edith Dembski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6828
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR PRODUCING FLAME-RESISTANT BODIES COMPRISING CONDENSING AN ACIDIC UNSATURATED HALOGEN-CONTAINING MIXED POLYESTER HAVING AN ACID NUMBER OF BETWEEN APPROXIMATELY 70 AND 150 WITH AN AMOUNT ESSENTIALLY CORRESPONDING TO THE ACID NUMBER OF THE MIXED POLYESTER OF A DIELS-ALDER ADDUCT OF HEXAHALOGENCYCLOPENTADIENE AND AN UNSATURATED GLYCIDYL ETHER AT A TEMPERATURE BELOW APPROXIMATELY 150*C. WHEREBY THE CARBOXYL GROUPS OF THE ACIDIC MIXED POLYESTER REACT WITH THE EPOXY GROUPS OF THE DIELS-ALDER ADDUCT AND THE ACID NUMBER OF THE REACTION PRODUCT IS REDUCED, AND POLYMERIZING THE PRODUCT OF SAID CONDENSATION WITH A COPOLYMERIZABLE MONOMERIC COMPOUND.
Claim 2
Dependent Claim
94 words
A PROCESS FOR PRODUCING FLAME-RESISTANT BODIES COMPRISING CONDENSING AN ACIDIC UNSATURATED HALOGEN-CONTAINING MIXED POLYESTER HAVING AN ACID NUMBER OF BETWEEN APPROXIMATELY 70 AND 150 WITH AN AMOUNT ESSENTIALLY CORRESPONDING TO THE ACID NUMBER OF THE MIXED POLYESTER OF A DIELS-ALDER ADDUCT OF HEXAHALOGENCYCLOPENTADIENE AND AN UNSATURATED GLYCIDYL ETHER AT A TEMPERATURE BELOW APPROXIMATELY 150*C. WHEREBY THE CARBOXYL GROUPS OF THE ACIDIC MIXED POLYESTER REACT WITH THE EPOXY GROUPS OF THE DIELS-ALDER ADDUCT AND THE ACID NUMBER OF THE REACTION PRODUCT IS REDUCED, AND POLYMERIZING THE PRODUCT OF SAID CONDENSATION WITH A COPOLYMERIZABLE MONOMERIC COMPOUND.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |