Patent US2925563A successfully refreshed from Google Patents.
Patent US3126296A successfully refreshed from Google Patents.
US3126296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification at
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
•
Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/521; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF TREATING CARBON AND INDUSTRIAL GRAPHITE MATERIALS FOR THE CHEMICAL INDUSTRY, COMPRISING THE STEPS OF IMPREGNATING THE SAID MATERIAL IN A BATH OF A FORMOPHENOLIC RESIN TOGETHER WITH FURFURYL OF A PHENOLFORMALDEHYDE RESIN WHOSE RESISTANCE TO CHEMICAL AGENTS ALCOHOL, AND SLOWLY CARBONISING THE MATERIALS SO TREATED AT A TEMPERATURE WHICH PROGRESSIVELY INCREASES AT A RATE OF APPROXIMATELY 3*C. PER HOUR OR LESS UP TO A MAXIMUM TEMPERATURE OF THE ORDER OF 1200*C.
Claim 2
Independent Claim
74 words
A METHOD OF TREATING CARBON AND INDUSTRIAL GRAPHITE MATERIALS FOR THE CHEMICAL INDUSTRY, COMPRISING THE STEPS OF IMPREGNATING THE SAID MATERIAL IN A BATH OF A FORMOPHENOLIC RESIN TOGETHER WITH FURFURYL OF A PHENOLFORMALDEHYDE RESIN WHOSE RESISTANCE TO CHEMICAL AGENTS ALCOHOL, AND SLOWLY CARBONISING THE MATERIALS SO TREATED AT A TEMPERATURE WHICH PROGRESSIVELY INCREASES AT A RATE OF APPROXIMATELY 3*C. PER HOUR OR LESS UP TO A MAXIMUM TEMPERATURE OF THE ORDER OF 1200*C.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |