US3346121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and method for its production
Assignee: Corning Glass Works
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Filing: 1965-08-13
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Granted: 1967-10-10
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Expires: 1985-08-13
Abstract
No abstract record available.
Inventors
- 👤 Alexander O Bally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:45
CPC Classifications
B; B31; B31D; B31D5/00; B31D5/0082; B01; B01D; B01D25/00; B01D25/001; B01D25/22; B01D25/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD FOR MAKING A FILTER BODY WHICH COMPRISES THE STEPS OF FORMING A SHEET OF CORRUGATED MATERIAL HAVING RIDGES AND GROOVES THEREIN, FORMING IN THE VICINITY OF ONE EDGE OF SAID CORRUGATED MATERIAL A RAISED PORTION HAVING A SURFACE CORRESPONDING TO THE MAXIMUM HEIGHTS OF SAID RIDGES AND IN THE VICINITY OF AN OPPOSED EDGE OF SAID SHEET A LOWERED PORTION HAVING A SURFACE CORRESPONDING IN HEIGHT TO THE MINIMUM HEIGHT OF SAID GROOVES, FORMING A BODY COMPRISING ALTERNATE LAYERS OF SAID CORRUGATED MATERIAL AND A GENERALLY SMOOTH SPACER MATERIAL WITH SAID RIDGES AND GROOVES OF SAID SHEETS OF CORRUGATED MATERIAL GENERALLY PARALLEL TO ONE ANOTHER TO FORM WITH SAID SPACER MATERIAL A PLURALITY OF CHANNELS EXTENDING BETWEEN OPPOSED SURFACES OF SAID BODY, AT LEAST ONE OF SAID CORRUGATED MATERIAL AND SAID SPACER MATERIAL BEING POROUS, SAID RAISED AND LOWERED PORTIONS OF SAID CORRUGATED MATERIAL FORMING BARRIERS WITHIN SAID CHANNELS,
Claim 2
Dependent Claim
112 words
A FILTER ELEMENT USEFUL IN THE MANUFACTURE OF FILTER BODIES, WHICH ELEMENT COMPRISES A CORRUGATED SHEET OF FILTER MATERIAL HAVING GENERALLY PARALLEL RIDGES AND GROOVES, A RAISED GENERALLY SMOOTH SURFCE PORTION IN THE VICINITY OF A FIRST EDGE OF SAID SHEET EXTENDING IN A DIRECTION GENERALLY PERPENDICULAR TO SAID RIDGES AND GROOVES AND HAVING A HEIGHT SUBSTANTIALLY CORRESPONDING TO THE MAXIMUM HEIGHTS OF SAID RIDGES, AN IN THE VICINITY OF A SECOND EDGE OF SAID SHEET OPPOSED TO SAID FIRST EDGE A LOWERED PORTION EXTENDING IN A DIRECTION GENERALLY PARALLEL TO SAID RAISED PORTION AND HAVING A GENERALLY SMOOTH SURFACE HAVING A HEIGHT SUBSTANTIALLY CORRESPONDING TO THE MINIMUM HEIGHTS OF SAID GROOVES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |