US3172285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeability meter
Assignee: Harry W Dietert Co
•
Filing: 1960-11-07
•
Granted: 1965-03-09
•
Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Harry W Dietert
- 👤 Ralph E Steinmueller
- 👤 Randolph L Dietert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/082; G01N15/0826
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
A PERMEABILITY METER COMPRISING A PRESSURE CHAMBER, ONE SIDE OF WHICH IS FORMED BY A SAMPLE SPECIMEN, THE PERMEABILITY OF WHICH IS TO BE DETERMINED HELD WITHIN AND END OF AN OPEN ENDED SPECIMEN TUBE, SEALING MEANS FOR SEALING THE OTHER END OF THE SPECIMENT UBE, A CONSTANT PRESSURE SOURCE CONNECTED TO SAID PRESSURE CHAMBER, METERING MEANS BETWEEN SAID CONSTANT PRESSURE SOURCE AND SAID PRESSURE CHAMBER FOR REGULATING THE PRESSURE IN THE PRESSURE CHAMBER, PRESSURE GAGE MEANS, AND ACTUATING MEANS FOR ALTERNATIVELY CONNECTING SAID PRESSURE GAGE MEANS TO SAID CONSTANT PRESSURE, SOURCE AND FOR CONNECTING SAID PRESSURE GAGE MEANS TO SAID PRESSURE CHAMBER AND OPERATING THE SEALING MEANS TO SEAL THE OTHER END OF SAID SPECIMEN TUBE.
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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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |