US2608528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microstill
Assignee: SINCLAIR RES LAB Inc
•
Filing: 1949-03-11
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Granted: 1952-08-26
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Expires: 1969-03-11
Abstract
No abstract record available.
Inventors
- 👤 John J Piros
- 👤 John A Glover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:37
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; Y; Y10; Y10S; Y10S203/00; Y10S203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A LABORATORY MICRO-STILL FOR THE FRACTIONAL DISTILLATION OF SMALL QUANTITIES OF MIXTURES OF LIQUIDS HAVING DIFFERENT BOILING POINTS, COMPRISING A STILL POT, A FRACTIONATING TUBE CONNECTED THERETO, A ROTATABLE ELONGATED HELICAL WIRE COIL DISPOSED WITHIN SAID TUBE AND HAVING TRANSVERSE MAJOR AND MINOR AXES, ITS DIMENSION ON THE TRANSVERSE MAJOR AXIS GREATLY EXCEEDING ITS DIMENSION
Claim 2
Dependent Claim
55 words
A LABORATORY MICRO-STILL FOR THE FRACTIONAL DISTILLATION OF SMALL QUANTITIES OF MIXTURES OF LIQUIDS HAVING DIFFERENT BOILING POINTS, COMPRISING A STILL POT, A FRACTIONATING TUBE CONNECTED THERETO, A ROTATABLE ELONGATED HELICAL WIRE COIL DISPOSED WITHIN SAID TUBE AND HAVING TRANSVERSE MAJOR AND MINOR AXES, ITS DIMENSION ON THE TRANSVERSE MAJOR AXIS GREATLY EXCEEDING ITS DIMENSION
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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |