US2594585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionating apparatus
Assignee: Pan American Refining Corp
•
Filing: 1946-10-31
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Granted: 1952-04-29
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Expires: 1966-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jr John A Ridgway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:14
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/30; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30238; B01J2219/30246; B01J2219/30249; B01J2219/30257; B01J2219/30276; B01J2219/3028; B01J2219/304; B01J2219/30408; B01J2219/30433; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A FRACTIONATING COLUMN PACKING CELL STRUCTURE COMPRISING A HOLLOW POLYHEDRON HAVING SUBSTANTIALLY PLANAR LAMINATED WALLS, EACH OF SAID WALLS COMPRISING A PLURALITY OF FORMAINOUS SHEETS PRODUCED BY A MULTIPLICITY OF NESTED POLYHEDRONS, EACH POLYHEDRON HAVING ONE OPEN FACE AND EACH ALTERNATE POLYHEDRON HAVING ITS OPEN FACE REVERSED WITH RESPECT TO THE NEXT NESTED POLYHEDRON, AND OPENINGS THROUGH THE INDIVIDUAL FORAMINOUS SHEETS OF SUFFICIENT SIZE TO PREVENT CAPIL-
Claim 2
Dependent Claim
67 words
A FRACTIONATING COLUMN PACKING CELL STRUCTURE COMPRISING A HOLLOW POLYHEDRON HAVING SUBSTANTIALLY PLANAR LAMINATED WALLS, EACH OF SAID WALLS COMPRISING A PLURALITY OF FORMAINOUS SHEETS PRODUCED BY A MULTIPLICITY OF NESTED POLYHEDRONS, EACH POLYHEDRON HAVING ONE OPEN FACE AND EACH ALTERNATE POLYHEDRON HAVING ITS OPEN FACE REVERSED WITH RESPECT TO THE NEXT NESTED POLYHEDRON, AND OPENINGS THROUGH THE INDIVIDUAL FORAMINOUS SHEETS OF SUFFICIENT SIZE TO PREVENT CAPIL-
References Cited (Backward Citations)
DE263200C
Cited
US1365671A
Cited
FR647108A
Cited
DE501196C
Cited
GB380746A
Cited
GB526609A
Cited
US2405593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |