US3100868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light gas detector using thin walled glass tubes for diffusion
Assignee: AT&T Inc
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Filing: 1958-08-20
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Granted: 1963-08-13
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Expires: 1978-08-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Kenneth B Mcafee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:30
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/68; G01N27/70; G01L; G01L21/00; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01N27/64; G01N27/66; G01N7/00; G01N7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A GAS DETECTING DEVICE COMPRISING A SENSING ELEMENT HAVING A MULTIPLICITY OF THIN WALLED GLASS TUBES HAVING AN OUTSIDE DIAMETER VARYING FROM ONE MIL TO FIFTY MILS AND A WALL THICKNESS VARYING FROM 0.2 MIL TO TEN MILS THROUGH WHICH A GAS TO BE DETECTED DIFFUSES AND A DETECTING ELEMENT SENSITIVE TO THE GAS DIFFUSING THROUGH THE GLASS TUBES.
Claim 2
Dependent Claim
59 words
A GAS DETECTING DEVICE COMPRISING A SENSING ELEMENT HAVING A MULTIPLICITY OF THIN WALLED GLASS TUBES HAVING AN OUTSIDE DIAMETER VARYING FROM ONE MIL TO FIFTY MILS AND A WALL THICKNESS VARYING FROM 0.2 MIL TO TEN MILS THROUGH WHICH A GAS TO BE DETECTED DIFFUSES AND A DETECTING ELEMENT SENSITIVE TO THE GAS DIFFUSING THROUGH THE GLASS TUBES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |