Patent US3021329A successfully refreshed from Google Patents.
US3021329A
Expired / Lapsed
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Dialdehyde starch-melamine derivatives
Assignee: Bayer Corp
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Filing: 1958-11-28
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Granted: 1962-02-13
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Expires: 1978-11-28
Abstract
No abstract record available.
Inventors
- 👤 Peter J Borchert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:50
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/18; C08B31/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A CONDENSATION PRODUCT OBTAINED BY REACTING IN SLURRY A DIALDEHYDE POLYSACCHARIDE WITH AN AMINO TRIAZINE SELECTED FROM THE GROUP CONSISTING OF MELAMINE, BENZOGUANAMINE AND N,N-DIALLYMELAMINE IN THE PRESENCE OF AN INERT REACTION MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER, N-BUTANOL, DIOXAN, AND MIXTURES THEREOF, AND AN ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND ACETIC ACID, AT A TEMPERATURE OF ABOUT FROM 50*C. TO 110*C. FOR ABOUT 1 TO 4 HOURS.
Claim 2
Dependent Claim
75 words
A CONDENSATION PRODUCT OBTAINED BY REACTING IN SLURRY A DIALDEHYDE POLYSACCHARIDE WITH AN AMINO TRIAZINE SELECTED FROM THE GROUP CONSISTING OF MELAMINE, BENZOGUANAMINE AND N,N-DIALLYMELAMINE IN THE PRESENCE OF AN INERT REACTION MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER, N-BUTANOL, DIOXAN, AND MIXTURES THEREOF, AND AN ACID CATALYST SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND ACETIC ACID, AT A TEMPERATURE OF ABOUT FROM 50*C. TO 110*C. FOR ABOUT 1 TO 4 HOURS.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |