US2664879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for testing ph values of body canal liquids and color comparator for use therewith
Assignee: Individual
•
Filing: 1950-09-08
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Granted: 1954-01-05
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Expires: 1970-09-08
Abstract
No abstract record available.
Inventors
- 👤 Hardy Lowell Macomber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:13
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
AN INSTRUMENT FOR USE IN TESTING THE PH VALUE OF BODY CANAL LIQUIDS WITH A PAPER STRIP SENSITIZED TO CHANGE COLOR, WHEN WETTED BY A LIQUID, TO INDICATE ITS RELATIVE ACIDITY OR ALKALINITY, SAID INSTRUMENT COMPRISING A HEAD INCLUDING A CONVEX CONTACT PORTION, A SUPPORTING SHANK FOR SAID HEAD, MEANS ASSOCIATED WITH SAID
References Cited (Backward Citations)
US592154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |