US2639289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorbent refining of oils
Assignee: PPG Industries Inc
•
Filing: 1950-04-21
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Granted: 1953-05-19
•
Expires: 1970-04-21
Abstract
No abstract record available.
Inventors
- 👤 Henry A Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A PROCESS OF REFINING GLYCERIDE OIL CONTAINING COLOR MATTER, THE STEPS OF ADMIXING THE OIL WITH SYNTHETIC MAGNESIUM SILICATE HAVING ACTIVE ADSORBING SURFACES, THEN BLOWING THE OIL AT 200 TO 250* F. WITH LIVE STEAM TO ADSORB THE COLORING MATTER UPON THE MAGNESIUM SILICATE, AND FILTERING OFF THE MAGNESIUM SILICATE WITH THE ADSORBED COLORING MATTER.
Claim 2
Dependent Claim
56 words
IN A PROCESS OF REFINING GLYCERIDE OIL CONTAINING COLOR MATTER, THE STEPS OF ADMIXING THE OIL WITH SYNTHETIC MAGNESIUM SILICATE HAVING ACTIVE ADSORBING SURFACES, THEN BLOWING THE OIL AT 200 TO 250* F. WITH LIVE STEAM TO ADSORB THE COLORING MATTER UPON THE MAGNESIUM SILICATE, AND FILTERING OFF THE MAGNESIUM SILICATE WITH THE ADSORBED COLORING MATTER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |