US3817708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation apparatus
Assignee: Phillips Petroleum Co
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Filing: 1972-04-10
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Granted: 1974-06-18
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Expires: 1992-04-10
Abstract
Abstract FLUID HEAT EXCHANGERS COMPRISING TWO U-TUBE BUNDLES DISPOSED WITHIN A COMMON EXTERIOR SHELL WITH THEIR RESPECTIVE BENDS IN AN ADJACENT, MONOVERLAPPING RELATIONSHIP AT THE MID PORTION OF SAID SHELL, WHEREIN MULTIPLE EXCHANGER SHELLS CAN BE PLACED IN A SIDE-BY-SIDE POSITION, JOINED WITH COMMUNICATING ENTRY AND EXIT FLUID CONDUITS. THE HEAT EXCHANGERS COMMUNICATE THROUGH FLUID OUTLET HEADERS TO TUBULAR REACTORS IN COMBINATION WITH AN ALKYLATION SETTLER.
Inventors
- 👤 W Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:30
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; F; F28; F28D; F28D7/00; F28D7/0066; F28D7/0083; F28D7/0091; F28D7/06; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |