Patent US1067593A successfully refreshed from Google Patents.
Patent US3324010A successfully refreshed from Google Patents.
US3324010A
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US
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Employing overhead as reboil heat with flow control
Assignee: Phillips Petroleum Co
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Filing: 1963-09-30
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Granted: 1967-06-06
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Robert D Bauer
- 👤 John L Ledbetter
- 👤 George R Hettick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:33
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4227; C; C07; C07C; C07C7/00; C07C7/04; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN THE METHOD OF HEAT EXCHANGING THE LOWER PORTION OF A FIRST SEPARATION COLUMN WITH THE OVERHEAD VAPOR OF A SECOND SEPARATION COLUMN WHEREIN SAID OVERHEAD VAPOR IS CONDENSED IN A REBOILER ASSOCIATED WITH SAID FIRST COLUMN AND RETURNED TO SAID SECOND COLUMN, THE IMPROVEMENT COMPRISING: CONTROLLING THE FLOW OF SAID OVERHEAD VAPOR TO SAID FIRST
Claim 2
Dependent Claim
56 words
IN THE METHOD OF HEAT EXCHANGING THE LOWER PORTION OF A FIRST SEPARATION COLUMN WITH THE OVERHEAD VAPOR OF A SECOND SEPARATION COLUMN WHEREIN SAID OVERHEAD VAPOR IS CONDENSED IN A REBOILER ASSOCIATED WITH SAID FIRST COLUMN AND RETURNED TO SAID SECOND COLUMN, THE IMPROVEMENT COMPRISING: CONTROLLING THE FLOW OF SAID OVERHEAD VAPOR TO SAID FIRST
References Cited (Backward Citations)
US2357113A
Cited
US2504464A
Cited
DE1010057B
Cited
US2805984A
Cited
US3085153A
Cited
US2988894A
Cited
US3115445A
Cited
US3232849A
Cited
US3281337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |