Patent US3534867A successfully refreshed from Google Patents.
US3103545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
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Filing: —
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Granted: 1963-09-10
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Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:33
CPC Classifications
F; F28; F28C; F28C1/00; F28C1/02; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A COLUMN FOR EFFECTING COUNTERCURRENT CONTACTING OF A LIQUID AND A VAPOR INCLUDING A PLURALITY OF HORIZONTALLY DISPOSED, VERTICALLY SPACED TRAYS, MEANS FOR MAINTAINING A MINIMUM LIQUID LEVEL ON EACH OF SAID PLURALITY OF TRAYS, AND A PLURALITY OF GENERALLY VERTICAL DISPOSED DOWNCOMERS, IN WHCIH SAID DOWNCOMERS ARE POSITIONED RELATIVE TO SAID STARYS SUCH THAT A TRAY IS PROVIDED WITH FIRST DOWNCOMER COMMUNICATING AT ITS LOWER END WITH THE TRAY AND A SECOND DOWNCOMER COMMUNICATING AT ITS UPPER END WITH THE TRAY WHEREIN THE FIRST DOWNCOMER RECEIVES LIQUID FROM A TRAY AND ADMITS SUCH LIQUID TO AN ADJACENT LOWER TRAY AND THE SECOND DOWNCOMER RECEIVES LIQUID FROM SAID ADJACENT LOWER TRAY AND ADMITS SUCH LIQUID TO THE NEXT LOWER TRAY, THE COMBINATION OF AT LEAST ONE OPENING IN THE SIDEWALL OF THE FIRST DOWNCOMER POSITIONED BELOW THE POINT AT WHICH A LIQUID LEVEL IN THE FIRST DOWNCOMER CAUSES
Claim 2
Dependent Claim
149 words
IN A COLUMN FOR EFFECTING COUNTERCURRENT CONTACTING OF A LIQUID AND A VAPOR INCLUDING A PLURALITY OF HORIZONTALLY DISPOSED, VERTICALLY SPACED TRAYS, MEANS FOR MAINTAINING A MINIMUM LIQUID LEVEL ON EACH OF SAID PLURALITY OF TRAYS, AND A PLURALITY OF GENERALLY VERTICAL DISPOSED DOWNCOMERS, IN WHCIH SAID DOWNCOMERS ARE POSITIONED RELATIVE TO SAID STARYS SUCH THAT A TRAY IS PROVIDED WITH FIRST DOWNCOMER COMMUNICATING AT ITS LOWER END WITH THE TRAY AND A SECOND DOWNCOMER COMMUNICATING AT ITS UPPER END WITH THE TRAY WHEREIN THE FIRST DOWNCOMER RECEIVES LIQUID FROM A TRAY AND ADMITS SUCH LIQUID TO AN ADJACENT LOWER TRAY AND THE SECOND DOWNCOMER RECEIVES LIQUID FROM SAID ADJACENT LOWER TRAY AND ADMITS SUCH LIQUID TO THE NEXT LOWER TRAY, THE COMBINATION OF AT LEAST ONE OPENING IN THE SIDEWALL OF THE FIRST DOWNCOMER POSITIONED BELOW THE POINT AT WHICH A LIQUID LEVEL IN THE FIRST DOWNCOMER CAUSES
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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |