US3262106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaseous hazard detector system and apparatus
Assignee: Individual
•
Filing: 1963-01-21
•
Granted: 1966-07-19
•
Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Robert B P Crawford
- 👤 Hurowitz Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/11; G08B17/113; G01; G01N; G01N27/00; G01N27/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
APPARATUS FOR ELECTRICALLY DETERMINING A HAZARD BY INCIPIENT CHANGES IN AN ENVIRONMENTAL MEDIUM, COMPRISING MEANS FOR CAUSING A STREAM OF AMBIENT AIR TO PASS THROUGH A PAIR OF ELECTRICAL CONDUCTIVITY CELLS IN SEQUENCE, THE CELLS OF SAID PAIR BEING IDENTICAL AND HAVING EQUAL ELECTRICAL POTENTIALS APPLIED THERETO, MEANS FOR SIMULTANEOUSLY MEASURING THE ELECTRICAL CONDUCTIVITY OF THE AIR IN
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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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |