US2758671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature filtering medium
Assignee: Individual
•
Filing: 1953-06-22
•
Granted: 1956-08-14
•
Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Silverman Leslie
- 👤 Robert A Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:55
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/66; B01D46/70; B01D46/72; B01D39/00; B01D39/14; B01D46/02; B01D46/026; B01D46/04; B01D2273/00; B01D2273/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN REVERSE JET CLEANING DEVICES, A FILTERING MEDIUM COMPRISING A LAYER OF INORGANIC FIBERS RESISTANT TO HIGH TEMPERATURES DISPOSED BETWEEN LAYERS OF FABRIC MADE FROM MATERIAL RESISTANT TO HIGH TEMPERATURES, BINDING MEANS DIVIDING THE MEDIUM INTO A PLURALITY OF PATCHES, ALL OF SAID LAYERS BEING STITCHED TOGETHER BY SAID BINDING MEANS AROUND THE PERIPHERY OF EACH PATCH WHEREBY THE FIBERS OF SAID LAYER OF INORGANIC FIBERS IN ONE PATCH ARE PREVENTED FROM MIGRATING TO AN ADJACENT PATCH, SAID BINDING MEANS FORMING A COMMON BOUNDRY BETWEEN ADJACENT PATCHES, WHEREBY A QUILT WITH A PLURALITY OF PATHCES IS FORMED FROM ALL OF SAID LAYERS AND SAID BINDING MEANS.
Claim 2
Dependent Claim
106 words
IN REVERSE JET CLEANING DEVICES, A FILTERING MEDIUM COMPRISING A LAYER OF INORGANIC FIBERS RESISTANT TO HIGH TEMPERATURES DISPOSED BETWEEN LAYERS OF FABRIC MADE FROM MATERIAL RESISTANT TO HIGH TEMPERATURES, BINDING MEANS DIVIDING THE MEDIUM INTO A PLURALITY OF PATCHES, ALL OF SAID LAYERS BEING STITCHED TOGETHER BY SAID BINDING MEANS AROUND THE PERIPHERY OF EACH PATCH WHEREBY THE FIBERS OF SAID LAYER OF INORGANIC FIBERS IN ONE PATCH ARE PREVENTED FROM MIGRATING TO AN ADJACENT PATCH, SAID BINDING MEANS FORMING A COMMON BOUNDRY BETWEEN ADJACENT PATCHES, WHEREBY A QUILT WITH A PLURALITY OF PATHCES IS FORMED FROM ALL OF SAID LAYERS AND SAID BINDING MEANS.
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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) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |