US2838377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood test
Assignee: Bayer Corp
•
Filing: 1953-09-10
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Granted: 1958-06-10
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Expires: 1973-09-10
Abstract
No abstract record available.
Inventors
- 👤 Dale E Fonner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:08
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/726; G01N33/725; Y; Y10; Y10S; Y10S436/00; Y10S436/904; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A DEVICE FOR TESTING FOR BLOOD IN FLUIDS, SAID DEVICE COMPRISING IN COMBINATION, A CLOSED ENVELOPE FORMED OF A SHEET MATERIAL WHICH IS PERMEABLE TO ELECTROLYTES BUT IMPERMEABLE TO SOLID MATERIALS AND AN OCCULT BLOOD DETECTING COMPOSITION ENCLOSED THEREIN, SAID DEVICE BEING ADAPTED TO BE WETTED BY AND TO FLOAT TO THE SURFACE OF SAID FLUID TO PROVIDE A SURFACE OF SAID SHEET MATERIAL ABOVE THE SURFACE OF THE SAID FLUID AND TO DEVELOP COLOR ON THE ABOVE SURFACE VISIBLE PORTION OF SAID SHEET MATERIAL WHEN OCCULT BLOOD IS PRESENT IN THE FLUID.
Claim 2
Independent Claim
93 words
A DEVICE FOR TESTING FOR BLOOD IN FLUIDS, SAID DEVICE COMPRISING IN COMBINATION, A CLOSED ENVELOPE FORMED OF A SHEET MATERIAL WHICH IS PERMEABLE TO ELECTROLYTES BUT IMPERMEABLE TO SOLID MATERIALS AND AN OCCULT BLOOD DETECTING COMPOSITION ENCLOSED THEREIN, SAID DEVICE BEING ADAPTED TO BE WETTED BY AND TO FLOAT TO THE SURFACE OF SAID FLUID TO PROVIDE A SURFACE OF SAID SHEET MATERIAL ABOVE THE SURFACE OF THE SAID FLUID AND TO DEVELOP COLOR ON THE ABOVE SURFACE VISIBLE PORTION OF SAID SHEET MATERIAL WHEN OCCULT BLOOD IS PRESENT IN THE FLUID.
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |