US2813844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amine-formaldehyde resin compositions modified with vinyl pyrrolidone polymers and process of sizing glass surface therewith
Assignee: GAF Chemicals Corp
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Filing: 1955-11-18
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Granted: 1957-11-19
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Expires: 1975-11-18
Abstract
No abstract record available.
Inventors
- 👤 Werner Jesse
- 👤 Steckler Robert
- 👤 Frederick A Hessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:14
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/34; C08; C08L; C08L39/00; C08L39/04; C08L39/06; C08L61/00; C08L61/20; C08J; C08J2361/00; C08J2361/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF 80 TO 97% BY WEIGHT OF AN AMINE-FORMALDEHYDE RESIN SELECTED FROM THE CLASS CONSISTING OF MELAMINE-FORMALDE-HYDE AND UREA-FORMALDEHYDE RESINS AND FROM 20-3% BYY WEIGHT OF A RESINOUS MATERIAL SELECTED FROM THE CLASS CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF N-VINYLPYRROLIDONE IN WHICH THE N-VINYLPYRROLIDONE HAS THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
56 words
A COMPOSITION OF MATTER COMPRISING A MIXTURE OF 80 TO 97% BY WEIGHT OF AN AMINE-FORMALDEHYDE RESIN SELECTED FROM THE CLASS CONSISTING OF MELAMINE-FORMALDE-HYDE AND UREA-FORMALDEHYDE RESINS AND FROM 20-3% BYY WEIGHT OF A RESINOUS MATERIAL SELECTED FROM THE CLASS CONSISTING OF HOMOPOLYMERS AND COPOLYMERS OF N-VINYLPYRROLIDONE IN WHICH THE N-VINYLPYRROLIDONE HAS THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2244184A
Cited
US2667473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |