US2806834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of polyesters condensed with xylene-formaldehyde resins, modified by treatment with polymerizable unsaturated compounds and method of making same
Assignee: Bayer AG
•
Filing: 1954-05-20
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Granted: 1957-09-17
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Expires: 1974-05-20
Abstract
No abstract record available.
Inventors
- 👤 Nischk Gunther
- 👤 Karl E Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:26
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PRODUCTION OF COPOLYMERS WHICH COMPRISES REACTING (1) A CONDENSATIN PRODUCT OF AN ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, A POLYHYDRIC ALCOHOL AND A XYLENE-FORMALDEHYDE RESIN WITH (2) A POLYMERIZABLE ORGANIC COMPOUND HAVING AN ETHYLENIC DOUBLE BOND.
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PRODUCTION OF COPOLYMERS WHICH COMPRISES REACTING (1) A CONDENSATIN PRODUCT OF AN ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID, A POLYHYDRIC ALCOHOL AND A XYLENE-FORMALDEHYDE RESIN WITH (2) A POLYMERIZABLE ORGANIC COMPOUND HAVING AN ETHYLENIC DOUBLE BOND.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |