US2562000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyarylene-siloxanes and processes for making same
Assignee: EIDP Inc
•
Filing: 1946-10-28
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Granted: 1951-07-24
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Expires: 1966-10-28
Abstract
No abstract record available.
Inventors
- 👤 Sveda Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C08G77/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
A LINEAR CONDENSATION POLYMER CONTAINING A LONG CHAIN OF RECURRING UNITS CONSISTING OF ALTENATE SILOXANE GROUPS AND ARYLENE RADICALS, THE TWO VALENCES OF EACH SILICON ATOM NOT JOINED IN THE POLYMER CHAIN BEING SATISFIED BY MONOVALENT HYDROCARBON RADICALS WHICH ARE FREE OF UNSATURATION OTHER THAN AROMATIC UNSATURATION, THE SILICON ATOMS BEING SITUATED PARA TO EACH OTHER ON THE ARYLENE RADICAL.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |