US2793017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for distributing falling liquid in thin films
Assignee: Dow Chemical Co
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Filing: 1954-10-04
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Granted: 1957-05-21
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Douglas E Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:07
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; F28F25/087; B; B01; B01D; B01D3/00; B01D3/008; B01J; B01J19/00; B01J19/32; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/3221; B01J2219/32213; B01J2219/32255; B01J2219/32265; B01J2219/32272; B01J2219/32275; B01J2219/324; B01J2219/32408; B01J2219/32425; B01J2219/32458
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN EXTENDED SURFACE ELEMENT FOR GAS-LIQUID CONTACT APPARATUS, TRICKLE FILTERS AND THE LIKE, CONSISTING ESSENTIALLY OF A THIN SHEET OF MATERIAL INERT TO THE FLUIDS WITH WHICH IT IS INTENDED TO SERVE ADAPTED TO STAND VERTICALLY ON ONE OF ITS LONGITUNDINALEDGES, HAVING A PLURALITY OF PARALLEL CORRUGATIONS LONGITUDINALLY DISPOSED AND WITH SMOOTHLY INTERCONNECTED ALTERNATE TROUGHS AND RIDGES COVERING MOST OF THE AREA OF THE SHEET; A PLURALITY OF RELATIVELY SHORT CORRUGATIONS DISPOSED TRANSVERSELY OF THE SHET ALONG EACH OF ITS TWO LONGITUDINAL MARGINS AND
Claim 2
Dependent Claim
84 words
AN EXTENDED SURFACE ELEMENT FOR GAS-LIQUID CONTACT APPARATUS, TRICKLE FILTERS AND THE LIKE, CONSISTING ESSENTIALLY OF A THIN SHEET OF MATERIAL INERT TO THE FLUIDS WITH WHICH IT IS INTENDED TO SERVE ADAPTED TO STAND VERTICALLY ON ONE OF ITS LONGITUNDINALEDGES, HAVING A PLURALITY OF PARALLEL CORRUGATIONS LONGITUDINALLY DISPOSED AND WITH SMOOTHLY INTERCONNECTED ALTERNATE TROUGHS AND RIDGES COVERING MOST OF THE AREA OF THE SHEET; A PLURALITY OF RELATIVELY SHORT CORRUGATIONS DISPOSED TRANSVERSELY OF THE SHET ALONG EACH OF ITS TWO LONGITUDINAL MARGINS AND
References Cited (Backward Citations)
GB190424467A
Cited
US1549068A
Cited
US1650140A
Cited
US1519739A
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DE678100C
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FR876525A
Cited
US2356653A
Cited
GB571510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |