US2955064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral coated liquid-gas contact pad
Assignee: Research Products Corp
•
Filing: 1957-06-07
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Granted: 1960-10-04
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Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Frohmader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00; B01D46/10; F24F6/00; F24F6/02; F24F6/04; F24F2221/00; F24F2221/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24322; Y10T428/31504; Y10T428/31652; Y10T428/31656
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A GAS-PERVIOUS LIQUID-GAS CONTACT PAD COMPRISING A PLURALITY OF SUPERPOSED SHEETS OF A WATER-IMPERMEABLE MATERIAL, EACH OF SAID SHEETS COMPRISING AN OPEN-MESH NETWORK OF INTERCONNECTED THIN FLAT WEBS HAVING THEIR BROAD SURFACES DISPOSED AT AN ANGLE TO THE GENERAL PLANE OF THE SHEETS, THE SURFACES OF SAID WEBS HAVING WICKING COATINGS THEREON, SAID COATINGS BEING SUBSTANTIALLY CONTINUOUS THROUGHOUT THE AREA OF EACH SAID SHEET AND CONSISTING ESSENTIALLY OF (1) A FINELY DIVIDED MINERAL, (2) MINERAL FIBERS, AND (3) A WATER-SOLUBLE ALKALINE METAL SILICATE, THE RATIO BY WEIGHT OF (1) TO (2) BEING FROM ABOUT 10:90 TO ABOUT 90:10, AND THE RATIO BY WEIGHT OF THE SIO2 CONTENT OF (3) TO THE TOTAL OF (1) PLUS (2) BEING AT LEAST 1.45:100.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |