US3113448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for precise volume determination
Assignee: Beckman Coulter Inc
•
Filing: 1961-01-12
•
Granted: 1963-12-10
•
Expires: 1981-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward V Hardway
- 👤 Eldon E Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:11
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/02; G01F; G01F17/00; G01N2009/022; G01N2009/026; G01N2009/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
IN A METHOD OF OPERATING A PYCNOMETER WHEREIN THE UNKNOWN VOLUME OF A SAMPLE IS DETERMINED USING FIRST AND SECOND VARIABLE VOLUME CHAMBERS WHOSE VOLUMES ARE CHANGED BETWEEN INITIAL VALUES AT WHICH THE SPECIFIC VOLUME OF GAS IN THE FIRST CHAMBER BEARS A GIVEN RELATIONSHIP TO THAT OF THE GAS IN THE SECOND CHAMBER, AND FINAL VALUES AT WHICH THE SAME SPECIFIC VOLUME RELATIONSHIP IS MAINTAINED SO THAT THE CHANGE IN VOLUME OF THE FIRST CHAMBER IS A MEASURE OF THE SAMPLE VOLUME, THE STEPS COMPRISING ADJUSTING AT LEAST ONE OF THE FINAL AND INITIAL VOLUME VALUES OF THE SECOND CHAMBER SO THAT THE SAME SPECIFIC VOLUME OF GAS RELATIONSHIP IS MAINTAINED AS THE VOLUME OF THE FIRST CHAMBER IS CHANGED FROM AN ESTIMATED INITIAL VALUE TO AN ARBITRARILY SELECTED ZERO VALUE WITH NO SAMPLE IN THE FIRST CHAMBER, PLACING A SAMPLE OF KNOWN VOLUME IN THE FIRST CHAMBER, CHANGING THE VOLUME OF THE SECOND CHAMBER FROM ITS INITIAL TO ITS FINAL VALUE, CHANGING THE VOLUME OF THE FIRST CHAMBER FROM SAID ESTIMATED INITIAL VALUE TO A VALUE AT WHICH SAID SPECIFIC VOLUME RELATIONSHIP IS RE-ESTABLISHED, CHANGING THE ESTIMATED INITIAL VOLUME VALUE OF THE FIRST CHAMBER TO A TRUE INITIAL VALUE IN ACCORDANCE WITH THE FORMULA
Claim 2
Dependent Claim
206 words
IN A METHOD OF OPERATING A PYCNOMETER WHEREIN THE UNKNOWN VOLUME OF A SAMPLE IS DETERMINED USING FIRST AND SECOND VARIABLE VOLUME CHAMBERS WHOSE VOLUMES ARE CHANGED BETWEEN INITIAL VALUES AT WHICH THE SPECIFIC VOLUME OF GAS IN THE FIRST CHAMBER BEARS A GIVEN RELATIONSHIP TO THAT OF THE GAS IN THE SECOND CHAMBER, AND FINAL VALUES AT WHICH THE SAME SPECIFIC VOLUME RELATIONSHIP IS MAINTAINED SO THAT THE CHANGE IN VOLUME OF THE FIRST CHAMBER IS A MEASURE OF THE SAMPLE VOLUME, THE STEPS COMPRISING ADJUSTING AT LEAST ONE OF THE FINAL AND INITIAL VOLUME VALUES OF THE SECOND CHAMBER SO THAT THE SAME SPECIFIC VOLUME OF GAS RELATIONSHIP IS MAINTAINED AS THE VOLUME OF THE FIRST CHAMBER IS CHANGED FROM AN ESTIMATED INITIAL VALUE TO AN ARBITRARILY SELECTED ZERO VALUE WITH NO SAMPLE IN THE FIRST CHAMBER, PLACING A SAMPLE OF KNOWN VOLUME IN THE FIRST CHAMBER, CHANGING THE VOLUME OF THE SECOND CHAMBER FROM ITS INITIAL TO ITS FINAL VALUE, CHANGING THE VOLUME OF THE FIRST CHAMBER FROM SAID ESTIMATED INITIAL VALUE TO A VALUE AT WHICH SAID SPECIFIC VOLUME RELATIONSHIP IS RE-ESTABLISHED, CHANGING THE ESTIMATED INITIAL VOLUME VALUE OF THE FIRST CHAMBER TO A TRUE INITIAL VALUE IN ACCORDANCE WITH THE FORMULA
References Cited (Backward Citations)
US2647394A
Cited
US2849881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |