US2879827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating material
Assignee: Taylor Fibre Co
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Filing: 1954-10-11
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Granted: 1959-03-31
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Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Jr William Raymond Bowditch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:31
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/12; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/36; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD OF PREPARING INSULATING MATERIAL COMPRISING MAINTAINING AN ADMIXTURE OF AT LAST ONE CRESOL, A PHENOL HAVING AN ALIPHATIC SIDE CHAIN OF A LAEAST FOUR CARBON ATOMS, FORMALDEHYDE AND AN ALKALI EARTH HYDROXIDE OVER AN EXTENDED PERIOD AT A TEMPERATURE SUFFICIENTLY LOW TO PREVENT SUBSTANTIAL RESINIFICATION UNTIL THE MIXTURE ATTAINS A VISCOSITY IN THE RANGE OF GARDNER A TO E, THEREBY TO FORM PHENOL ALCOHOLS, THEN ADDING TO SAID MIXTURE A MATERIAL PROVIDING HYDROGEN SULFIDE, AND ADDING TRICRESYL PHOSPHATE AND CHLORINATED DIPHENYL, THEN COATING PAPER THEREWITH WITHIN A TEMPERATURE RANGE IN EXCESS OF THE BOILING POINT OF WATER, AND LAMINATING SHEETS THUS COATED UNDER HIGH PRESSURE AND A ELEVATED TEMPERATURE
Claim 2
Independent Claim
111 words
A METHOD OF PREPARING INSULATING MATERIAL COMPRISING MAINTAINING AN ADMIXTURE OF AT LAST ONE CRESOL, A PHENOL HAVING AN ALIPHATIC SIDE CHAIN OF A LAEAST FOUR CARBON ATOMS, FORMALDEHYDE AND AN ALKALI EARTH HYDROXIDE OVER AN EXTENDED PERIOD AT A TEMPERATURE SUFFICIENTLY LOW TO PREVENT SUBSTANTIAL RESINIFICATION UNTIL THE MIXTURE ATTAINS A VISCOSITY IN THE RANGE OF GARDNER A TO E, THEREBY TO FORM PHENOL ALCOHOLS, THEN ADDING TO SAID MIXTURE A MATERIAL PROVIDING HYDROGEN SULFIDE, AND ADDING TRICRESYL PHOSPHATE AND CHLORINATED DIPHENYL, THEN COATING PAPER THEREWITH WITHIN A TEMPERATURE RANGE IN EXCESS OF THE BOILING POINT OF WATER, AND LAMINATING SHEETS THUS COATED UNDER HIGH PRESSURE AND A ELEVATED TEMPERATURE
References Cited (Backward Citations)
US2083063A
Cited
US2633458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |