Patent US4680490A successfully refreshed from Google Patents.
Patent US3199341A successfully refreshed from Google Patents.
US3199341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring compressibility of porous material
Assignee: ConocoPhillips Co
•
Filing: 1962-05-28
•
Granted: 1965-08-10
•
Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Jr George J Heuer
- 👤 Carroll F Knutson
- 👤 Robert J Cavanaugh
- 👤 Charles W Bright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:58
CPC Classifications
G; G01; G01N; G01N11/00; G01N2203/00; G01N2203/0058; G01N2203/0076; G01N2203/0085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD FOR MEASURING THE COMPRESSIBILITY OF A POROUS MATERIAL COMPRISING THE STEPS OF: APPLYING AN INTERNAL FLUID PRESSURE TO A SAMPLE OF THE POROUS MATERIAL; APPLYING AN INITIAL CONFINING FLUID PRESSURE OVER AT LEAST A PORTION OF THE SURFACE AREA OF THE SAMPLE OF THE MATERIAL WHILE MAINTAINING THE CONFINING FLUID PRESSURE ISOLATED FROM THE INTERNAL FLUID PRESSURE, THE INITIAL CONFINING FLUID PRESSURE BEING AT LEAST AS GREAT AS THE INTERNAL FLUID PRESSURE; INCREASING THE CONFINING FLUID PRESSURE; MAINTAINING THE INTERNAL FLUID PRESSURE ESSENTIALLY CONSTANT; AND, MEASURING THE VOLUME OF FLUID DISPLACED FROM THE SAMPLE OF MATERIAL.
Claim 2
Independent Claim
98 words
A METHOD FOR MEASURING THE COMPRESSIBILITY OF A POROUS MATERIAL COMPRISING THE STEPS OF: APPLYING AN INTERNAL FLUID PRESSURE TO A SAMPLE OF THE POROUS MATERIAL; APPLYING AN INITIAL CONFINING FLUID PRESSURE OVER AT LEAST A PORTION OF THE SURFACE AREA OF THE SAMPLE OF THE MATERIAL WHILE MAINTAINING THE CONFINING FLUID PRESSURE ISOLATED FROM THE INTERNAL FLUID PRESSURE, THE INITIAL CONFINING FLUID PRESSURE BEING AT LEAST AS GREAT AS THE INTERNAL FLUID PRESSURE; INCREASING THE CONFINING FLUID PRESSURE; MAINTAINING THE INTERNAL FLUID PRESSURE ESSENTIALLY CONSTANT; AND, MEASURING THE VOLUME OF FLUID DISPLACED FROM THE SAMPLE OF MATERIAL.
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |