US2609334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Falling-film fractionation
Assignee: EIDP Inc
•
Filing: 1949-05-07
•
Granted: 1952-09-02
•
Expires: 1969-05-07
Abstract
No abstract record available.
Inventors
- 👤 Pyle Cyrus
- 👤 James A Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:02
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/26; B01D3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN AN APPARATUS FOR FILM-TYPE FRACTIONATION OF HEAT-SENSITIVE MATERIALS COMPRISING, IN COMBINATION, A VAPORIZING UNIT OR ZONE HAVING A MULTIPLICITY OF FILM-FORMING CHANNELS THEREIN, MEANS FOR INTRODUCING HEAT-SENSITIVE MATERIAL INTO THE MULTIPLICITY OF CHANNELS TO FLOW IN FILM FORM DOWNWARDLY THEREIN, A HEATING CHAMBER BELOW SAID VAPORIZING UNIT IN POSIITION TO COLLECT UNVAPORIZED MATERIAL FROM SAID CHANNELS, AN UPPER CONDENSING UNIT OR ZONE HAVING A MULTIPLICITY OF SIMILAR FILM-FORMING CHANNLES THEREIN, A PRODUCT COLLECTION CHAMBER INTERPOSED BETWEEN SAID
Claim 2
Dependent Claim
78 words
IN AN APPARATUS FOR FILM-TYPE FRACTIONATION OF HEAT-SENSITIVE MATERIALS COMPRISING, IN COMBINATION, A VAPORIZING UNIT OR ZONE HAVING A MULTIPLICITY OF FILM-FORMING CHANNELS THEREIN, MEANS FOR INTRODUCING HEAT-SENSITIVE MATERIAL INTO THE MULTIPLICITY OF CHANNELS TO FLOW IN FILM FORM DOWNWARDLY THEREIN, A HEATING CHAMBER BELOW SAID VAPORIZING UNIT IN POSIITION TO COLLECT UNVAPORIZED MATERIAL FROM SAID CHANNELS, AN UPPER CONDENSING UNIT OR ZONE HAVING A MULTIPLICITY OF SIMILAR FILM-FORMING CHANNLES THEREIN, A PRODUCT COLLECTION CHAMBER INTERPOSED BETWEEN SAID
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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) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |