Patent US2633459A successfully refreshed from Google Patents.
US2633459A
Expired / Lapsed
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Flowable melamine resin and diguanidine carbonate
Assignee: Wyeth Holdings LLC
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Filing: 1951-11-23
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Granted: 1953-03-31
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Expires: 1971-11-23
Abstract
No abstract record available.
Inventors
- 👤 John F Blais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A COMPOSITION OF MATTER COMPRISING A MELAMINE-FORMALDEHYDE RESIN AND 0.025%-5% BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN, OF DIGUANIDINE CARBONATE, WHEREIN THE MOL RATIO OF MELAMINE TO FORMALDEHYDE IS BETWEEN ABOUT 1:1.5 AND 1:3, RESPECTIVELY.
Claim 2
Dependent Claim
37 words
A COMPOSITION OF MATTER COMPRISING A MELAMINE-FORMALDEHYDE RESIN AND 0.025%-5% BY WEIGHT, BASED ON THE WEIGHT OF THE RESIN, OF DIGUANIDINE CARBONATE, WHEREIN THE MOL RATIO OF MELAMINE TO FORMALDEHYDE IS BETWEEN ABOUT 1:1.5 AND 1:3, RESPECTIVELY.
References Cited (Backward Citations)
FR993874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |