US2674584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dextran urea formaldehyde compositions
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1952-10-06
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Granted: 1954-04-06
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Expires: 1972-10-06
Abstract
No abstract record available.
Inventors
- 👤 George L Deniston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:07
CPC Classifications
C; C09; C09D; C09D161/00; C09D161/20; C09D161/22; C09D161/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE PROCESS OF PROVIDING A BASE MATERIAL WITH A COATING HAVING QUALITIES OF ACID RESISTANCE WHICH PROCESS INCLUDES THE STEPS OF FORMING AN AQUEOUS PLASTIC MASS COMPRISING DEXTRAN AND A WATER-SOLUBLE UREA-FORMALDEHYDE RESIN, APPLYING THE MASS TO SAID BASE MATERIAL, AND HEATING THE MASS IN CONTACT WITH THE BASE TO ELIMINATE THE WATER THEREFROM AND SET THE COMPOSITION.
Claim 2
Dependent Claim
58 words
THE PROCESS OF PROVIDING A BASE MATERIAL WITH A COATING HAVING QUALITIES OF ACID RESISTANCE WHICH PROCESS INCLUDES THE STEPS OF FORMING AN AQUEOUS PLASTIC MASS COMPRISING DEXTRAN AND A WATER-SOLUBLE UREA-FORMALDEHYDE RESIN, APPLYING THE MASS TO SAID BASE MATERIAL, AND HEATING THE MASS IN CONTACT WITH THE BASE TO ELIMINATE THE WATER THEREFROM AND SET THE COMPOSITION.
References Cited (Backward Citations)
US2624768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |