US2639980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining carbon and sulfur
Assignee: Individual
•
Filing: 1950-02-09
•
Granted: 1953-05-26
•
Expires: 1970-02-09
Abstract
No abstract record available.
Inventors
- 👤 Charles B Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:54
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
APPARATUS FOR MEASURING THE VOLUME OF GASES UNDER CONSTANT CONDITIONS OF TEMPERATURE AND PRESSURE COMPRISING A GAS BURETTE, A LIQUID CONTAINING LEVELING BOTTLE CONNECTED TO THE BOTTOM OF THE BUREETE, A RESERVIOR CONNECTED TO THE TOP OF SAID BURETTE, A GAS CONTAINING CHAMBER ENCLOSED IN SAID RESERVOIR, A MANOMETER TUBE HAVING ONE LEG CONNECTED TO SAID CHAMBER, A CONNECTION
Claim 2
Dependent Claim
59 words
APPARATUS FOR MEASURING THE VOLUME OF GASES UNDER CONSTANT CONDITIONS OF TEMPERATURE AND PRESSURE COMPRISING A GAS BURETTE, A LIQUID CONTAINING LEVELING BOTTLE CONNECTED TO THE BOTTOM OF THE BUREETE, A RESERVIOR CONNECTED TO THE TOP OF SAID BURETTE, A GAS CONTAINING CHAMBER ENCLOSED IN SAID RESERVOIR, A MANOMETER TUBE HAVING ONE LEG CONNECTED TO SAID CHAMBER, A CONNECTION
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |