Patent US3309912A successfully refreshed from Google Patents.
US3309912A
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Porosity data apparatus
Assignee: Georgia Tech Research Institute
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Filing: 1963-09-20
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Granted: 1967-03-21
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Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 Boland Paul
- 👤 Jr Julian D Fleming
- 👤 Joe N Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:45
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
APPARATUS FOR OBTAINING DATA RELATING TO THE POROSITY OF A SPECIMENT OF POROUS MATERIAL BY THE DISPLACEMENT OF A GAS, SAID APPARATUS COMPRISING SEALING MEANS FOR SEALING THE PORES OF THE SPECIMEN, SAID SEALING MEANS FORMING AN ENVELOPE AROUND THE SPECIMEN; ENCLOSING MEANS FOR ENCLOSING THE ENVELOPE WITHIN A GAS-TIGHT CAVITY; VALVE MEANS FOR SELECTIVELY PERMITTING THE ENTRY OF THE GAS INTO THE CAVITY AND INTO THE ENVELOPE; AND MEASURING MEANS FOR DETERMINING THE VOLUMES OF THE GAS WHICH ENTER THE CAVITY AND THE ENVELOPE.
Claim 2
Dependent Claim
85 words
APPARATUS FOR OBTAINING DATA RELATING TO THE POROSITY OF A SPECIMENT OF POROUS MATERIAL BY THE DISPLACEMENT OF A GAS, SAID APPARATUS COMPRISING SEALING MEANS FOR SEALING THE PORES OF THE SPECIMEN, SAID SEALING MEANS FORMING AN ENVELOPE AROUND THE SPECIMEN; ENCLOSING MEANS FOR ENCLOSING THE ENVELOPE WITHIN A GAS-TIGHT CAVITY; VALVE MEANS FOR SELECTIVELY PERMITTING THE ENTRY OF THE GAS INTO THE CAVITY AND INTO THE ENVELOPE; AND MEASURING MEANS FOR DETERMINING THE VOLUMES OF THE GAS WHICH ENTER THE CAVITY AND THE ENVELOPE.
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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |