Patent DE857271C successfully refreshed from Google Patents.
US3229503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure densimeter
Assignee: Individual
•
Filing: 1963-09-10
•
Granted: 1966-01-18
•
Expires: 1983-09-10
Abstract
No abstract record available.
Inventors
- 👤 Donald R Poole
- 👤 Donald G Nyberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:26
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/02; G01N9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD OF DETERMINING THE DENSITY OF A LIQUID HAVING A HIGH VAPOR PRESSURE COMPRISING THE STEPS OF: (A) INTRODUCING A KNOWN WEIGHT OF SAID LIQUID A RELATIVELY LOW TEMPERATURE INTO A VARIABLE VOLUME AND TEMPERATURE CONTROLLED CHAMBER, (B) GRADUALLY INCREASING THE TEMPERATURE OF SAID CHAMBER AND LIQUID TO THE TEMPERATURE AT AWHICH THE DENSITY OF THE LIQUID IS TO BE DETERMINED, (C) GRADUALLY INCREASING THE VOLUME OF SAID CHAMBER AT THE DESIRED TEMPERATURE, THUS GRADUALLY CONDENSING THE VAPOR CONTAINED WITHIN THE LIQUID, AND SIMULTANEOUSLY MEASURING THE SUBSTANTIALLY CONSTANT PRESSURE WITHIN THE CHAMBER AS THE VAPOR IS CONDENSING UNTIL THE SUBSTANTIALLY CONSTANT PRESSURE RAPIDLY INCREASES, AT WHICH POINT ALL OF THE VAPOR IS LIQUIFIED, (D) MEASURING THE VOLUME OF THE LIQUID AT THE POINT AT WHICH THE PRESSURE RAPIDLY INCREASES, AND
Claim 2
Independent Claim
131 words
A METHOD OF DETERMINING THE DENSITY OF A LIQUID HAVING A HIGH VAPOR PRESSURE COMPRISING THE STEPS OF: (A) INTRODUCING A KNOWN WEIGHT OF SAID LIQUID A RELATIVELY LOW TEMPERATURE INTO A VARIABLE VOLUME AND TEMPERATURE CONTROLLED CHAMBER, (B) GRADUALLY INCREASING THE TEMPERATURE OF SAID CHAMBER AND LIQUID TO THE TEMPERATURE AT AWHICH THE DENSITY OF THE LIQUID IS TO BE DETERMINED, (C) GRADUALLY INCREASING THE VOLUME OF SAID CHAMBER AT THE DESIRED TEMPERATURE, THUS GRADUALLY CONDENSING THE VAPOR CONTAINED WITHIN THE LIQUID, AND SIMULTANEOUSLY MEASURING THE SUBSTANTIALLY CONSTANT PRESSURE WITHIN THE CHAMBER AS THE VAPOR IS CONDENSING UNTIL THE SUBSTANTIALLY CONSTANT PRESSURE RAPIDLY INCREASES, AT WHICH POINT ALL OF THE VAPOR IS LIQUIFIED, (D) MEASURING THE VOLUME OF THE LIQUID AT THE POINT AT WHICH THE PRESSURE RAPIDLY INCREASES, AND
References Cited (Backward Citations)
DE1073213B
Cited
US2576747A
Cited
US3030808A
Cited
US3060724A
Cited
US3060130A
Cited
US3129585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |