US3067169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-stable polycondensation products
Assignee: Bayer AG
•
Filing: 1958-03-03
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Granted: 1962-12-04
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Krimm Heinrich
- 👤 Schnell Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:07
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G63/00; C08G63/68; C08G63/695; C08G63/6954; C08G63/6956; C08G63/78; C08G63/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
PROCESS FOR THE PRODUCTION OF HEAT-STABLE, THERMOPLASTIC POLYCONDENSATION PRODUCTS WHICH COMPRISES REACTING IN A ONE-STEP PROCESS 1 MOL OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF DIMETHYL. DIETHYL, DIPHENYL, METHYL-PHENYL, AND ETHYL-PHENYL DIHYDROXY SILANE, DIHALOGEN SILANES AND DIMETHOXY, DIETHOXY AND DIPHENOXY SILANE, ABOUT 1 TO ABOUT 4 MOL OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF AROMATIC P-DICARBOXYLIC ACIDS, DIHALIDES AND DIESTERS THEREOF, WITH ABOUT 2 TO ABOUT 5 MOL OF AROMATIC DIHYDROXY COMPOUNDS WITH AROMATICALLY BOUND HYDROXYL GROUPS, UNFUSED AROMATIC RINGS AND FREE OF OTHER REACTIVE SUBSTITUTENTS, AT TEMPERATURES FROM ROOM TEMPERATURE TO ABOUT 400*C.
Claim 2
Dependent Claim
96 words
PROCESS FOR THE PRODUCTION OF HEAT-STABLE, THERMOPLASTIC POLYCONDENSATION PRODUCTS WHICH COMPRISES REACTING IN A ONE-STEP PROCESS 1 MOL OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF DIMETHYL. DIETHYL, DIPHENYL, METHYL-PHENYL, AND ETHYL-PHENYL DIHYDROXY SILANE, DIHALOGEN SILANES AND DIMETHOXY, DIETHOXY AND DIPHENOXY SILANE, ABOUT 1 TO ABOUT 4 MOL OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF AROMATIC P-DICARBOXYLIC ACIDS, DIHALIDES AND DIESTERS THEREOF, WITH ABOUT 2 TO ABOUT 5 MOL OF AROMATIC DIHYDROXY COMPOUNDS WITH AROMATICALLY BOUND HYDROXYL GROUPS, UNFUSED AROMATIC RINGS AND FREE OF OTHER REACTIVE SUBSTITUTENTS, AT TEMPERATURES FROM ROOM TEMPERATURE TO ABOUT 400*C.
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |