Patent US4653441A successfully refreshed from Google Patents.
Patent US2500941A successfully refreshed from Google Patents.
US2500941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geiger-mueller counter structure
Assignee: Individual
•
Filing: 1946-03-07
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Granted: 1950-03-21
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Expires: 1966-03-07
Abstract
No abstract record available.
Inventors
- 👤 Friedman Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:29
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A DETECTING ELEMENT FOR A RADIOGRAPHIC EXPOSURE METER COMPRISING, A GEIGER-MUELLER COUNTER HAVING A COAXIAL ANODE AND A CATHODE, AN ENVELOPE THEREFOR, AND A GASEOUS FILLING OF SUBSTANTIAL PRESSURE THEREIN, SIAD CATHODE HAVING AN ACTIVE SURFACE CONTAINING A PHOTOSENSITIVE SILVER HALIDE.
Claim 2
Dependent Claim
41 words
A DETECTING ELEMENT FOR A RADIOGRAPHIC EXPOSURE METER COMPRISING, A GEIGER-MUELLER COUNTER HAVING A COAXIAL ANODE AND A CATHODE, AN ENVELOPE THEREFOR, AND A GASEOUS FILLING OF SUBSTANTIAL PRESSURE THEREIN, SIAD CATHODE HAVING AN ACTIVE SURFACE CONTAINING A PHOTOSENSITIVE SILVER HALIDE.
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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |