US3138014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for continuously measuring the permeability of a porous layer
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1963-02-19
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Granted: 1964-06-23
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Expires: 1983-02-19
Abstract
No abstract record available.
Inventors
- 👤 Jorre Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:44
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/082; G01N15/0826; C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; C22B1/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF CONTINUOUSLY MEASURING THE PERMEABILITY OF A POROUS LAYER OF MATERIAL, COMPRISING THE STEPS OF SUPPORTING ONE SURFACE OF THE POROUS LAYER ON ONE SURFACE OF A PERMEABLE MOVING SUPPORT, PASSING THE MOVING SUPPORT WITH THE POROUS LAYER THROUGH A MEASURING STATION, APPLYING SUCTION TO THE OTHER SURFACE OF THE PERMEABLE SUPPORT OF THE POROUS LAYER AT THE MEASURING STATION WITHOUT CAUSING ANY SUBSTANTIAL DISTURBANCE OF THE FLOW CONDITIONS OF AIR PASSING TO THE OTHER SURFACE, SUPPLYING
Claim 2
Independent Claim
79 words
A METHOD OF CONTINUOUSLY MEASURING THE PERMEABILITY OF A POROUS LAYER OF MATERIAL, COMPRISING THE STEPS OF SUPPORTING ONE SURFACE OF THE POROUS LAYER ON ONE SURFACE OF A PERMEABLE MOVING SUPPORT, PASSING THE MOVING SUPPORT WITH THE POROUS LAYER THROUGH A MEASURING STATION, APPLYING SUCTION TO THE OTHER SURFACE OF THE PERMEABLE SUPPORT OF THE POROUS LAYER AT THE MEASURING STATION WITHOUT CAUSING ANY SUBSTANTIAL DISTURBANCE OF THE FLOW CONDITIONS OF AIR PASSING TO THE OTHER SURFACE, SUPPLYING
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |