US2993764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purification by sublimation
Assignee: Compagnie Francaise des Matieres Colorantes SARL
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Filing: 1957-12-06
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Granted: 1961-07-25
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Expires: 1977-12-06
Abstract
No abstract record available.
Inventors
- 👤 Grulet Louis
- 👤 Roe Rene Pierre Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:34
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/12; B01D7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
APPARATUS FOR PURIFICATION BY SUBLIMATION WHICH COMPRISES A VACUUM-TIGHT CASING, A FIXED PLATED FORMED FROM AT LEAST TWO ANGULARLY SPACED SECTORS OF A CIRCLE COMMONLY SECURED AT THEIR APICES, MEANS FOR SUPPORTING SAID PLATE IN SAID CASING, MEANS FOR HEATING SAID PLATE, MEANS FOR ADMITTING A MATERIAL TO BE PURIFIED TO SAID PLATE, A ROTATING COOLED DISC DISPOSED IN CLOSELY SPACED RELATIONSHIP ABOVE SAID PLATE, AND SCRAPING MEANS DISPOSED BETWEEN THE SECTORS CONTACTING SAID DISC FOR REMOVING A SUBLIMED PRODUCT THEREFROM.
Claim 2
Dependent Claim
81 words
APPARATUS FOR PURIFICATION BY SUBLIMATION WHICH COMPRISES A VACUUM-TIGHT CASING, A FIXED PLATED FORMED FROM AT LEAST TWO ANGULARLY SPACED SECTORS OF A CIRCLE COMMONLY SECURED AT THEIR APICES, MEANS FOR SUPPORTING SAID PLATE IN SAID CASING, MEANS FOR HEATING SAID PLATE, MEANS FOR ADMITTING A MATERIAL TO BE PURIFIED TO SAID PLATE, A ROTATING COOLED DISC DISPOSED IN CLOSELY SPACED RELATIONSHIP ABOVE SAID PLATE, AND SCRAPING MEANS DISPOSED BETWEEN THE SECTORS CONTACTING SAID DISC FOR REMOVING A SUBLIMED PRODUCT THEREFROM.
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) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |