US3238783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breath sampling apparatus
Assignee: National Research Development Corp UK
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Filing: 1963-08-26
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Granted: 1966-03-08
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Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 Wright Basil Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:15
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N31/00; G01N31/22; G01N33/00; G01N33/48; G01N33/483; G01N33/497; G01N33/4972; G01N33/50; G01N33/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
BREATH-SAMPLING APPARATUS COMPRISING A BREATH SAMPLE CHAMBER, A DIAPHRAGM CONSTITUTING A FLEXIBLE WALL OF SAID CHAMBER AND MOVABLE BY BREATH ENTERING THE CHAMBER TO EXPAND SAID CHAMBER TO A PREDETERMINED VOLUME, A BREATHL INLET PASSAGE LEADING TO SAID CHAMBER AND HAVING A VENT TO ATMOSPHERE, A VALVE CONTROLLING ADMISSION OF BREATH INTO SAID CHAMBER FROM SAID PASSAGE AND WHICH REMAINS CLOSED WHILE SAID PASSAGE IS OPEN TO ATMOSPHERE
Claim 2
Dependent Claim
68 words
BREATH-SAMPLING APPARATUS COMPRISING A BREATH SAMPLE CHAMBER, A DIAPHRAGM CONSTITUTING A FLEXIBLE WALL OF SAID CHAMBER AND MOVABLE BY BREATH ENTERING THE CHAMBER TO EXPAND SAID CHAMBER TO A PREDETERMINED VOLUME, A BREATHL INLET PASSAGE LEADING TO SAID CHAMBER AND HAVING A VENT TO ATMOSPHERE, A VALVE CONTROLLING ADMISSION OF BREATH INTO SAID CHAMBER FROM SAID PASSAGE AND WHICH REMAINS CLOSED WHILE SAID PASSAGE IS OPEN TO ATMOSPHERE
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |