US2918453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry preparations capable of yielding cation-active melamine resin solutions by dissolution in water and ripening and process for their manufacture
Assignee: BASF Schweiz AG
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Filing: 1956-11-19
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Granted: 1959-12-22
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Expires: 1976-11-19
Abstract
No abstract record available.
Inventors
- 👤 Widmer Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:46
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30; C08G12/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A SUBSTANTIALLY DRY PREPARATION CAPABLE OF YIELDING A CATION-ACTIVE MELAMINE RESIN SOLUTION BY DISSOLUTION IN WATER AND RIPENING, WHICH PREPARATION CONSISTS ESSENTIALLY OF A HARDENABLE CONDENSATION PRODUCT OF ONE MOLECULAR PROPORTION OF MELAMINE WITH 2 TO 6 MOLECULAR PROPORTIONS OF FORMALDEHYDE AN ABOUT 0.5 TO 1.5 MOLECULAR PROPORTIONS OF A STRONG MONOBASIC MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID AND NITRIC ACID PER ONE MOLECULAR PROPORTION OF MELAMINE.
Claim 2
Dependent Claim
71 words
A SUBSTANTIALLY DRY PREPARATION CAPABLE OF YIELDING A CATION-ACTIVE MELAMINE RESIN SOLUTION BY DISSOLUTION IN WATER AND RIPENING, WHICH PREPARATION CONSISTS ESSENTIALLY OF A HARDENABLE CONDENSATION PRODUCT OF ONE MOLECULAR PROPORTION OF MELAMINE WITH 2 TO 6 MOLECULAR PROPORTIONS OF FORMALDEHYDE AN ABOUT 0.5 TO 1.5 MOLECULAR PROPORTIONS OF A STRONG MONOBASIC MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID AND NITRIC ACID PER ONE MOLECULAR PROPORTION OF MELAMINE.
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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |