Patent US2809176A successfully refreshed from Google Patents.
US2809176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of dextran-modified polyester with urea-formaldehyde alcohol condensates and method of producing
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1954-11-30
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Granted: 1957-10-08
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Expires: 1974-11-30
Abstract
No abstract record available.
Inventors
- 👤 Elwood P Wenzelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:18
CPC Classifications
C; C08; C08L; C08L67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A HOMOGENEOUS PLASTIC REACTION PRODUCT OF (1) A FLUID DEXTRAN-MODIFIED POLYESTER OBTAINED BY INTERACTION OF COMPONENTS CONSISTING ESSENTIALLY OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UNSATURATED POLYCARBOXYLIC ACIDS AND ANHYDRIDES THEREOF, A POLYHYDRIC ALCOHOL AND DEXTRA, AND (2) A SOLUTION OF A HYDROCARBON SOLVENT-SOLUBLE UREA-FORMALDEHYDE-ALCOHOL CONDENSATE IN THE REACTANT ALCOHOL.
Claim 2
Dependent Claim
52 words
A HOMOGENEOUS PLASTIC REACTION PRODUCT OF (1) A FLUID DEXTRAN-MODIFIED POLYESTER OBTAINED BY INTERACTION OF COMPONENTS CONSISTING ESSENTIALLY OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UNSATURATED POLYCARBOXYLIC ACIDS AND ANHYDRIDES THEREOF, A POLYHYDRIC ALCOHOL AND DEXTRA, AND (2) A SOLUTION OF A HYDROCARBON SOLVENT-SOLUBLE UREA-FORMALDEHYDE-ALCOHOL CONDENSATE IN THE REACTANT ALCOHOL.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |