US3843561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mat of inorganic oxide fibers,its method of preparation and its impregnation with catalytic materials
Assignee: Universal Oil Products Co
•
Filing: 1972-08-22
•
Granted: 1974-10-22
•
Expires: 1992-08-22
Abstract
Abstract 1. AN ANNULAR FORM LIQUID PERVIOUS MAT OF FIBROUS MATERAIL THAT IS SUITABLE FOR THE CONTACT OF A FLUID FLOW THERETHROUGH, WHICH COMPRISES, A PLURALITY OF RECROSSING HELICALLY WOUND LAYERS OF LONG, FLEXIBLE, POROUS HIGH SURFACE AREA REFRACTORY INORGANIC OXIDE FIBER, WITH SAID FIBER HAVING BEEN PREPARED BY FORMING A NON-HOLLOW FIBER FROM A MIXTURE OF A REFRACTORY INORGANIC OXIDE SOL AND A FIBERFORMING ORGANIC POLYMER AND BY SUBSEQUENTLY CALCINING THE FIBER AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 1000* C. TO BURN OFF THE FIBER-FORMING ORGANIC POLYMER PORTION OF THE COMPOSITE.
Inventors
- 👤 J Sobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01J; B01J35/00; B01J35/50; B01J35/58; B01J37/00; B01J37/0009; B01J37/0018; B01D29/13; B01D29/15; B01D29/21; B01D29/216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
AN ANNULAR FORM LIQUID PERVIOUS MAT OF FIBROUS MATERAIL THAT IS SUITABLE FOR THE CONTACT OF A FLUID FLOW THERETHROUGH, WHICH COMPRISES, A PLURALITY OF RECROSSING HELICALLY WOUND LAYERS OF LONG, FLEXIBLE, POROUS HIGH SURFACE AREA REFRACTORY INORGANIC OXIDE FIBER, WITH SAID FIBER HAVING BEEN PREPARED BY FORMING A NON-HOLLOW FIBER FROM A MIXTURE OF A REFRACTORY INORGANIC OXIDE SOL AND A FIBERFORMING ORGANIC POLYMER AND BY SUBSEQUENTLY CALCINING THE FIBER AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 1000* C. TO BURN OFF THE FIBER-FORMING ORGANIC POLYMER PORTION OF THE COMPOSITE.
Claim 2
Dependent Claim
93 words
AN ANNULAR FORM LIQUID PERVIOUS MAT OF FIBROUS MATERAIL THAT IS SUITABLE FOR THE CONTACT OF A FLUID FLOW THERETHROUGH, WHICH COMPRISES, A PLURALITY OF RECROSSING HELICALLY WOUND LAYERS OF LONG, FLEXIBLE, POROUS HIGH SURFACE AREA REFRACTORY INORGANIC OXIDE FIBER, WITH SAID FIBER HAVING BEEN PREPARED BY FORMING A NON-HOLLOW FIBER FROM A MIXTURE OF A REFRACTORY INORGANIC OXIDE SOL AND A FIBERFORMING ORGANIC POLYMER AND BY SUBSEQUENTLY CALCINING THE FIBER AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 1000* C. TO BURN OFF THE FIBER-FORMING ORGANIC POLYMER PORTION OF THE COMPOSITE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |