US2494641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1945-04-12
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Granted: 1950-01-17
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Expires: 1965-04-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Anderson
- 👤 Philip G Koontz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:29
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A DEVICE FOR INDICATING THE INTENSITY OF BETA RAYS, COMPRISING A CATHODE IN THE FORM OF A THIN WALLED ENVELOPE OF MATERIAL OF LOW ABSORPTION FOR BETA RAYS, AND OF UNIFORM OUTER THICKNESS AND UNIFORM DIAMETER THROUGHOUT SUBSTANTIALLY ITS ENTIRE LENGTH, AND AN ANODE AND IONIZABLE MEDIUM CONTAINED IN SAID ENVELOPE, WHEREIN THE CATHODE IS A UNITARY CUP-SHAPED MEMBER HAVING A THICKENED WALL PORTION ADJACENT TO THE CLOSED END THEREOF.
Claim 2
Independent Claim
70 words
A DEVICE FOR INDICATING THE INTENSITY OF BETA RAYS, COMPRISING A CATHODE IN THE FORM OF A THIN WALLED ENVELOPE OF MATERIAL OF LOW ABSORPTION FOR BETA RAYS, AND OF UNIFORM OUTER THICKNESS AND UNIFORM DIAMETER THROUGHOUT SUBSTANTIALLY ITS ENTIRE LENGTH, AND AN ANODE AND IONIZABLE MEDIUM CONTAINED IN SAID ENVELOPE, WHEREIN THE CATHODE IS A UNITARY CUP-SHAPED MEMBER HAVING A THICKENED WALL PORTION ADJACENT TO THE CLOSED END THEREOF.
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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |