US2746607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous membrane
Assignee: Selas Corp of America
•
Filing: 1952-05-16
•
Granted: 1956-05-22
•
Expires: 1972-05-16
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:24
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B01D17/00; B01D17/02; B01D17/04; B01D17/045; B01D17/08; B01D17/085; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A UNIT FOR A FLUID SEPARATOR CONSISTING OF SPACED CONCENTRIC POROUS TUBES OF WOVEN MATERIAL IMPREGNATED WITH A THERMO-SETTING RESIN, A BODY OF GLASS FIBERS SO DISPERSED AS TO BE POROUS, AND ALSO IMPREGNATED WITH SAID
Claim 2
Dependent Claim
36 words
A UNIT FOR A FLUID SEPARATOR CONSISTING OF SPACED CONCENTRIC POROUS TUBES OF WOVEN MATERIAL IMPREGNATED WITH A THERMO-SETTING RESIN, A BODY OF GLASS FIBERS SO DISPERSED AS TO BE POROUS, AND ALSO IMPREGNATED WITH SAID
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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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |