Patent US3839017A successfully refreshed from Google Patents.
Patent US3227523A successfully refreshed from Google Patents.
US3227523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical analyzer
Assignee: HOEFKER
•
Filing: 1962-01-09
•
Granted: 1966-01-04
•
Expires: 1982-01-09
Abstract
No abstract record available.
Inventors
- 👤 Gerhard J Hoefker
- 👤 Ted P Harding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:44
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
A CHEMICAL ANALYZER COMPRISING: MEANS FORMING THREE CHAMBERS CALLED TO TOP CHAMBER, A MIXING CHAMBER AND A SIPHON CHAMBER FOR COLOR DEVELOPMENT, SAID MIXING CHAMBER BEING BELOW SAID TOP CHAMBER, SAID SIPHON CHAMBER BEING BELOW SAID MIXING CHAMBER, MEANS IN SAID TOP CHAMBER FOR PROVIDING CONSTANT FLOW OF SAMPLE FROM SAID TOP CHAMBER TO SAID MIXING CHAMBER, MEANS FOR CONDUCTING A CONSTANT FLOW OF REAGENT TO SAID MIXING CHAMBER, MEANS FOR PROVIDING AIR VENTS FROM THE EXTERIOR OF EACH CHAMBER INTO EACH CHAMBER, MEANS FOR CONDUCTING FLUID FLOW FROM SAID MIXING CHAMBER TO SAID SIPHON CHAMBER, AN AUTOMATIC SIPHON DISPOSED IN SAID SIPHON CHAMBER, MEANS FOR CONDUCTING REACTED SAMPLE FLUID FROM SAID SIPHON OUTWARDLY OF SAID SIPHON CHAMBER WHEN SAID SIPHON IS PRINTED TO MAKE ROOM FOR SEQUENTIAL
References Cited (Backward Citations)
US2202346A
Cited
US2342366A
Cited
US2408900A
Cited
US2680060A
Cited
GB793792A
Cited
US2901327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |