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US3286509A
Expired / Lapsed
US
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Apparatus for measuring water vapor permeability
Assignee: ST Regis Paper Co
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Filing: 1964-09-22
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Granted: 1966-11-22
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Expires: 1984-09-22
Abstract
No abstract record available.
Inventors
- 👤 Michael J Gluckman
- 👤 Hubert O Ranger
- 👤 Alfred E Beecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:10
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
APPARATUS FOR DETERMINING THE WATER VAPOR PERMEABILITY OF A GIVEN MATERIAL, SAID APPARATUS COMPRISING TOP AND BOTTOM CELLS ADAPTED TO BE INTERCONNECTED TO FORM AN AIR-TIGHT CHAMBER THEREBETWEEN, SAID MATERIAL WHOSE WATER PERMEABILITY IS TO BE DETERMINED BEING POSITIONED IN SAID CHAMBER BETWEEN SAID TOP AND BOTTOM CELLS WHEREBY WATER VAPOR PASSSING FROM ONE OF SAID CELLS TO THE OTHER MUST PASS THROUGH SAID MATERIAL, MEANS FOR REGULATING THE RELATIVE HUMIDITY IN SAID CELLS WHEREBY THE RELATIVE HUMIDITY IN SAID BOTTOM CELL IS HIGHER THAN THE RELATIVE HUMIDITY IN SAID TOP CELL, MEANS FOR MEASURING CHANGES IN RELATIVE HUMIDITY IN SAID TOP CELL, AND MEANS FOR MEASURING THE TIME REQUIRED FOR THE RELATIVE HUMIDITY IN SAID TOP CELL TO INCREASE FROM ONE VALUE TO ANOTHER DUE TO THE PASSAGE OF WATER VAPOR FROM SAID BOTTOM CELL THROUGH SAID MATERIAL TO SAID TOP CELL WHEREBY THE WATER VAPOR PERMEABILITY OF SAID MATERIAL CAN BE DETERMINED.
Claim 2
Dependent Claim
154 words
APPARATUS FOR DETERMINING THE WATER VAPOR PERMEABILITY OF A GIVEN MATERIAL, SAID APPARATUS COMPRISING TOP AND BOTTOM CELLS ADAPTED TO BE INTERCONNECTED TO FORM AN AIR-TIGHT CHAMBER THEREBETWEEN, SAID MATERIAL WHOSE WATER PERMEABILITY IS TO BE DETERMINED BEING POSITIONED IN SAID CHAMBER BETWEEN SAID TOP AND BOTTOM CELLS WHEREBY WATER VAPOR PASSSING FROM ONE OF SAID CELLS TO THE OTHER MUST PASS THROUGH SAID MATERIAL, MEANS FOR REGULATING THE RELATIVE HUMIDITY IN SAID CELLS WHEREBY THE RELATIVE HUMIDITY IN SAID BOTTOM CELL IS HIGHER THAN THE RELATIVE HUMIDITY IN SAID TOP CELL, MEANS FOR MEASURING CHANGES IN RELATIVE HUMIDITY IN SAID TOP CELL, AND MEANS FOR MEASURING THE TIME REQUIRED FOR THE RELATIVE HUMIDITY IN SAID TOP CELL TO INCREASE FROM ONE VALUE TO ANOTHER DUE TO THE PASSAGE OF WATER VAPOR FROM SAID BOTTOM CELL THROUGH SAID MATERIAL TO SAID TOP CELL WHEREBY THE WATER VAPOR PERMEABILITY OF SAID MATERIAL CAN BE DETERMINED.
References Cited (Backward Citations)
US2904996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |