US3042495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring dissolved oxygen
Assignee: Beckman Coulter Inc
•
Filing: 1959-06-19
•
Granted: 1962-07-03
•
Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Ray I Wilson
- 👤 Jan W Haagen-Smit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:43
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/021; G01N33/00; G01N33/18; G01N33/1806; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/207497; Y10T436/209163; Y10T436/25; Y10T436/25125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A METHOD OF MEASURING TRACE AMOUNTS OF DISSOLVED OXYGEN IN WATER, THE STEPS OF: PASSING THE WATER SAMPLE CONTAINING DISSOLVED OXYGEN OVER METALLIC LEAD; AND MEASURING THE CHANGE IN LEAD ION CONTENT OF THE SAMPLE RESULTING FROM THE CONTACT WITH THE LEAD, THE QUANTITY OF DISSOVLED OXYGEN IN THE INCOMING SAMPLE BEING PROPORTIONAL TO THE CHANGE IN LEAD ION CONTENT.
Claim 2
Dependent Claim
61 words
IN A METHOD OF MEASURING TRACE AMOUNTS OF DISSOLVED OXYGEN IN WATER, THE STEPS OF: PASSING THE WATER SAMPLE CONTAINING DISSOLVED OXYGEN OVER METALLIC LEAD; AND MEASURING THE CHANGE IN LEAD ION CONTENT OF THE SAMPLE RESULTING FROM THE CONTACT WITH THE LEAD, THE QUANTITY OF DISSOVLED OXYGEN IN THE INCOMING SAMPLE BEING PROPORTIONAL TO THE CHANGE IN LEAD ION CONTENT.
References Cited (Backward Citations)
US2901327A
Cited
US2876189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |