US3706596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for the manufacture of oxidation resistant graphite articles
Assignee: Airco Inc
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Filing: 1970-12-24
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Granted: 1972-12-19
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Expires: 1990-12-24
Abstract
Abstract INCREASED OXIDATION RESISTANCE PROPERTIES ARE ENABLED IN A GRAPHITE ARTICLE BY A PROCESS ACCORDING TH WHICH THE SAID ARTICLE IS IMPREGNATED WITH AN AQUEOUS COLLOIDAL DISPERSION OF PARTCULATE SILICA AND WITH A SOLUTION OF METHYL ALCOHOL CONTAINING BORIC OXIDE AND PHOSPHOROUS PENTOXIDE INT EH FORM OF METHYL BORATE AND METHYL PHOSPATE ESTERS. FOLLOWING SAID IMPREGNATION THE ARTICLE IS DRIED, ANDWHERE HIGH TEMPERATURE USE (UP TO 1200* C.) IS CONTEMPLATED-FIRED TO 1100* C. IN AN INERT ATMOSPHERE. IN ADDITION TO THE PROCESS SET FORTH, THE GRAPHITE PRODUCTS RESULTING THEREFROM ARE CLAIMED, AS IS THE IMPREGNANT PER SE.
Inventors
- 👤 Rudolph W Wallouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:06
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/50; C04B41/5076; C04B41/5092; C04B41/52; C04B41/80; C04B41/81; C04B41/82; C04B41/85; C04B41/89; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |