Patent US2530376A successfully refreshed from Google Patents.
US2530376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum distillation
Assignee: Individual
•
Filing: 1948-02-27
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Granted: 1950-11-21
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Expires: 1968-02-27
Abstract
No abstract record available.
Inventors
- 👤 Francis J Castle
- 👤 Robert E Beal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:32
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/10; B01D1/00; B01D1/22; Y; Y10; Y10S; Y10S159/00; Y10S159/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A STILL COMPRISING IN COMBINATION A CONDENSING SURFACE AND A TUBULAR, SMOOTH, HEATED EVAPORATION SURFACE SPACED FROM THE CONDENSING SURFACE, SAID EVAPORATION SURFACE HAVING TIGHTLY FITTED THEREON A READILY REMOVABLE, FLEXIBLE, PLIABLE, AND PERMEABLE COVERING SLEEVE OF INERT, ACID-RESISTANT, NON-METALLIC, MESH FABRIC OF MINERAL MATTER; TO DISTRIBUTE THE DISTILLAND SUPPLIED TO THE HEATED EVAPORATION SURFACE AND TO RETAIN SUBSTANTIALLY ALL TARRY AND GUMMY RESIDUE FORMED AT THE EVAPORATION SURFACE AND THUS PREVENT THE EVAPORATION SURFACE ITSELF FROM COLLECTING THE SAID RESIDUE MATERIAL, AND MEANS TO SUPPLY DISTILLAND TO THE HEATED EVAPORATION SURFACE.
Claim 2
Dependent Claim
92 words
A STILL COMPRISING IN COMBINATION A CONDENSING SURFACE AND A TUBULAR, SMOOTH, HEATED EVAPORATION SURFACE SPACED FROM THE CONDENSING SURFACE, SAID EVAPORATION SURFACE HAVING TIGHTLY FITTED THEREON A READILY REMOVABLE, FLEXIBLE, PLIABLE, AND PERMEABLE COVERING SLEEVE OF INERT, ACID-RESISTANT, NON-METALLIC, MESH FABRIC OF MINERAL MATTER; TO DISTRIBUTE THE DISTILLAND SUPPLIED TO THE HEATED EVAPORATION SURFACE AND TO RETAIN SUBSTANTIALLY ALL TARRY AND GUMMY RESIDUE FORMED AT THE EVAPORATION SURFACE AND THUS PREVENT THE EVAPORATION SURFACE ITSELF FROM COLLECTING THE SAID RESIDUE MATERIAL, AND MEANS TO SUPPLY DISTILLAND TO THE HEATED EVAPORATION SURFACE.
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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |