Patent US2825543A successfully refreshed from Google Patents.
US2825543A
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US
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Gas-liquid contact apparatus
Assignee: Diamond Shamrock Corp
•
Filing: 1954-06-21
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Granted: 1958-03-04
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Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Mccracken
- 👤 Ernest L Bolick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:21
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/025; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22590E
Cited
GB190700290A
Cited
DE326569C
Cited
FR605026A
Cited
US1839952A
Cited
US2489031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |