US3009889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition prepared by reacting formaldehyde with a urea-oxidized starch reaction product and process of making
Assignee: Bayer Corp
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Filing: 1959-01-19
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Granted: 1961-11-21
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Expires: 1979-01-19
Abstract
No abstract record available.
Inventors
- 👤 Borchert Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:35
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/18; C08B31/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AS A COMPOSITION OF MATTER, AN OXYMETHYLATED UREA DERIVATIVE OF 2,3-DIALDEHYDE STARCH OBTAINED BY INTIMATELY CONTACTING IN A REACTION MEDIUM TAKEN FROM THE GROUP CONSISTING OF WATER AND METHANOL AT A TEMPERATURE RANGING FROM ABOUT 25 TO 70*C. AND AT A PH RANGING FROM ABOUT 2 TO 7, FORMALDEHYDE WITH A "POLYGLUCOSYLOL-UREA" COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS WHOSE POLYMER UNITS CORRESPOND TO THE FOLLOWING GENERAL FORMULAE:
Claim 2
Dependent Claim
69 words
AS A COMPOSITION OF MATTER, AN OXYMETHYLATED UREA DERIVATIVE OF 2,3-DIALDEHYDE STARCH OBTAINED BY INTIMATELY CONTACTING IN A REACTION MEDIUM TAKEN FROM THE GROUP CONSISTING OF WATER AND METHANOL AT A TEMPERATURE RANGING FROM ABOUT 25 TO 70*C. AND AT A PH RANGING FROM ABOUT 2 TO 7, FORMALDEHYDE WITH A "POLYGLUCOSYLOL-UREA" COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS WHOSE POLYMER UNITS CORRESPOND TO THE FOLLOWING GENERAL FORMULAE:
References Cited (Backward Citations)
US2725362A
Cited
US2886542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |