US2762449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensing method and apparatus
Assignee: United Engineers and Constructors Inc
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Filing: 1953-08-11
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Granted: 1956-09-11
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Expires: 1973-08-11
Abstract
No abstract record available.
Inventors
- 👤 Sweeney Maxwell Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:37
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/573; B; B01; B01D; B01D7/00; B01D7/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
METHOD FOR RECOVERING A CONDENSIBLE COMPONENT SELECTED FROM THE GROUP CONSISTING OF PHTHALIC AND MALEIC ANHYDRIDES WHICH COMPRISES MOVING SAID MIXTURE THROUGH FIRST CONDUIT MEANS COATED ON THE INSIDE WITH SOLID COMPONENT, AND THEREBY MELTING SOLID COMPONENT FROM THE INNER WALLS OF SAID FIRST CONDUIT MEANS; AND THEN MOVING SAID MIXTURE THROUGH SECOND CONDUIT MEANS, SIMULTANEOUSLY MOVING SEPARATE STREAMS OF THE SAME GASEOUS COOLANT PAST THE OUTSIDE OF EACH OF SAID CONDUIT MEANS, AND THEREBY COOLING THE HOT GASEOUS MIXTURE IN CONTACT WITH SAID FIRST CONDUIT MEANS TO ABOVE THE TEMPERATURE AT WHICH SAID COMPONENT CONDENSES AS A SOLID AND CONDENSING SOLID COMPONENT ON THE INNER WALLS OF SAID SECOND CONDUIT MEANS.
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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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |