US2809953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified phenol-formaldehyde resin compositions and process of sizing glass surface therewith
Assignee: GAF Chemicals Corp
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Filing: 1955-11-18
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Granted: 1957-10-15
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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
2026-10-24 10:40
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08L39/00; C08L39/04; C08L39/06; Y; Y10; Y10S; Y10S424/00; Y10S424/02; Y10S525/00; Y10S525/936; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A COMPOSITION OF MATTERS COMPRISING A MIXTURE OF 80 TO 97% BY WEIGHT OF PHENOL-FORMALDEHYDE RESIN AND FROM 20 TO 3% BY 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
47 words
A COMPOSITION OF MATTERS COMPRISING A MIXTURE OF 80 TO 97% BY WEIGHT OF PHENOL-FORMALDEHYDE RESIN AND FROM 20 TO 3% BY 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)
US1831462A
Cited
US2667473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |