US2827946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates comprising alkenyl substituted phenolic resins as binders
Assignee: PPG Industries Inc
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Filing: 1954-03-09
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Granted: 1958-03-25
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Expires: 1974-03-09
Abstract
No abstract record available.
Inventors
- 👤 Roger M Christenson
- 👤 Richard A Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:34
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C70/00; B29C70/003; C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; H; H01; H01B; H01B3/00; H01B3/002; H01B3/004; H01B3/18; H01B3/30; H01B3/44; H01B3/447; H01B3/48; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; B29K; B29K2309/00; B29K2309/08; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T442/00; Y10T442/20; Y10T442/2475
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A LAMINATE OF HIGH TENSILE STRENGTH, HIGH DIELECTRIC STRENGTH AND LIGHT COLOR, COMPRISING A FIBROIUS SHEET OF FIBERS WHICH ARE BONDED BY CONDENSATION PRODUCTS FORMED IN THE ABSENCE OF FREE OXYGEN AND FREE IRON AND BEING OF ABOUT 0.5 TO 5 MOLES OF FORMALDEHYDE AND 2 MOLES OF A BUTENYL PHENOL MIXTURE OBTAINED BY SUBSTITUTION OF HYDROGEN IN THE BENZENE RING OF PHENOL THROUGH REACTION OF PHENOL WITH BUTADIENE IN THE PRESENCE OF A FRIEDEL-CRAFTS CTALYSTS, THE BUTENYL PHENOL MIXTURE CONSISTING PRIMARILY OF COMPOUNDS OF THE FORMULAE:
Claim 2
Dependent Claim
87 words
A LAMINATE OF HIGH TENSILE STRENGTH, HIGH DIELECTRIC STRENGTH AND LIGHT COLOR, COMPRISING A FIBROIUS SHEET OF FIBERS WHICH ARE BONDED BY CONDENSATION PRODUCTS FORMED IN THE ABSENCE OF FREE OXYGEN AND FREE IRON AND BEING OF ABOUT 0.5 TO 5 MOLES OF FORMALDEHYDE AND 2 MOLES OF A BUTENYL PHENOL MIXTURE OBTAINED BY SUBSTITUTION OF HYDROGEN IN THE BENZENE RING OF PHENOL THROUGH REACTION OF PHENOL WITH BUTADIENE IN THE PRESENCE OF A FRIEDEL-CRAFTS CTALYSTS, THE BUTENYL PHENOL MIXTURE CONSISTING PRIMARILY OF COMPOUNDS OF THE FORMULAE:
References Cited (Backward Citations)
US2006043A
Cited
US2175393A
Cited
US2415763A
Cited
US2587578A
Cited
US2675335A
Cited
US2631140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |