US3282082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for molecular weight determination
Assignee: Gruppo Lepetit SpA
•
Filing: 1963-12-26
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Granted: 1966-11-01
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Fagioli Oliviero
- 👤 Ros Angelo De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:00
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/02; G01N25/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
APPARATUS FOR USE IN MOLECULAR WEIGHT DETERMINATION, COMPRISING MEANS PROVIDING A PLURALITY OF CELLS, OPEN AT THE TOP, ONE OF THE CELLS BEING ADAPTED TO RECEIVE A SOLUTION, IN A LIQUID SOLVENT, OF A KNOWN CONCENTRATION OF A TEST SUBSTANCE WHOSE MOLECULAR WEIGHT IS TO BE DETERMINED, WHILE THE OTHER CELLS ARE ADAPTED TO RECEIVE SOLUTIONS, IN THE SAME SOLVENT, OF DIFFERENT MOLARITIES OF A KNOWN COMPOUND, MEANS FOR SIMULTANEOUSLY AND UNIFORMLY HEAT ING THE CONTENTS OF ALL OF THE CELLS, TRANSPARENT COVER MEANS COVERING THE TOPS OF THE CELLS, AND MEANS FOR SIMULTANEOUSLY AND UNIFORMLY COOLING THE COVER MEANS TO CAUSE CONDENSATION OF VAPOR OF THE SOLVENT UPON THE UNDERSIDE OF THE COVER MEANS OVER ALL OF THE CELLS, WHEREBY UPON REMOVAL OF THE COOLING MEANS AND GRADUAL RISE OF TEMPERATURE OF THE COVER MEANS, THE VISIBLE CONDENSATE FILMS WILL DISAPPEAR IN A SUCCESSION DEPENDING UPON THE MOLAR CONCENTRATIONS IN THE SOLUTIONS BOTH OF THE KNOWN SUBSTANCE AND OF THE TEST SUBSTANCE WHOSE MOLECULAR WEIGHT IS TO BE DETERMINED, WHEREBY THE TIME INTERVALS FOR THE DISAPPEARANCE OF THE DEW FROM THE CELLS CONTAINING THE KNOWN AND THE UNKNOWN TEST SUBSTANCES PROVIDE DATA FROM WHICH THE MOLECULAR WEIGHT OF THE TEST SUBSTANCE CAN BE CALCULATED.
Claim 2
Dependent Claim
205 words
APPARATUS FOR USE IN MOLECULAR WEIGHT DETERMINATION, COMPRISING MEANS PROVIDING A PLURALITY OF CELLS, OPEN AT THE TOP, ONE OF THE CELLS BEING ADAPTED TO RECEIVE A SOLUTION, IN A LIQUID SOLVENT, OF A KNOWN CONCENTRATION OF A TEST SUBSTANCE WHOSE MOLECULAR WEIGHT IS TO BE DETERMINED, WHILE THE OTHER CELLS ARE ADAPTED TO RECEIVE SOLUTIONS, IN THE SAME SOLVENT, OF DIFFERENT MOLARITIES OF A KNOWN COMPOUND, MEANS FOR SIMULTANEOUSLY AND UNIFORMLY HEAT ING THE CONTENTS OF ALL OF THE CELLS, TRANSPARENT COVER MEANS COVERING THE TOPS OF THE CELLS, AND MEANS FOR SIMULTANEOUSLY AND UNIFORMLY COOLING THE COVER MEANS TO CAUSE CONDENSATION OF VAPOR OF THE SOLVENT UPON THE UNDERSIDE OF THE COVER MEANS OVER ALL OF THE CELLS, WHEREBY UPON REMOVAL OF THE COOLING MEANS AND GRADUAL RISE OF TEMPERATURE OF THE COVER MEANS, THE VISIBLE CONDENSATE FILMS WILL DISAPPEAR IN A SUCCESSION DEPENDING UPON THE MOLAR CONCENTRATIONS IN THE SOLUTIONS BOTH OF THE KNOWN SUBSTANCE AND OF THE TEST SUBSTANCE WHOSE MOLECULAR WEIGHT IS TO BE DETERMINED, WHEREBY THE TIME INTERVALS FOR THE DISAPPEARANCE OF THE DEW FROM THE CELLS CONTAINING THE KNOWN AND THE UNKNOWN TEST SUBSTANCES PROVIDE DATA FROM WHICH THE MOLECULAR WEIGHT OF THE TEST SUBSTANCE CAN BE CALCULATED.
References Cited (Backward Citations)
US1680638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |