US3030538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionisation chamber
Assignee: US Philips Corp
•
Filing: 1958-06-16
•
Granted: 1962-04-17
•
Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Warmoltz Nicolaas
- 👤 Schampers Paulus Philipp Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:51
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/02; H01J47/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN IONIZATION CHAMBER FOR MEASURING GAMMA RAYS, X-RAYS, AND THE LIKE, COMPRISING A SEALED ENVELOPE HAVING A WALL PORTION OF SUBSTANTIAL SURFACE AREA CONSTITUED OF A SUBSTATIAL AIR-WALL EQUIVALENT MATERIAL AND SEPARATING THE ENVELOPE INTERIOR FROM THE OUTSIDE ENVIRONMENT, AN IONIZABLE MEDIUM AND ELECTRODE SYSTEM WITHIN THE ENVELOPE, EXTERNAL TERMINALS SEALED IN THE ENVELOPE AND CONNECTED INTERNALLY TO THE ELECTRODE SYSTEM, SAID SEPARATING WALL PORTION CONSISTING OF ELECTRICALLY-INSULATING, GAS-TIGHT, VITREOUS BORIC ACID ANHYDRIDE, AND MEANS SURROUNDING THE SAID WALL PORTION OF BORIC ACID ANHYDRIDE AND PREVENTING MOISTURE FROM COMING INTO CONTACT THEREWITH.
Claim 2
Dependent Claim
92 words
AN IONIZATION CHAMBER FOR MEASURING GAMMA RAYS, X-RAYS, AND THE LIKE, COMPRISING A SEALED ENVELOPE HAVING A WALL PORTION OF SUBSTANTIAL SURFACE AREA CONSTITUED OF A SUBSTATIAL AIR-WALL EQUIVALENT MATERIAL AND SEPARATING THE ENVELOPE INTERIOR FROM THE OUTSIDE ENVIRONMENT, AN IONIZABLE MEDIUM AND ELECTRODE SYSTEM WITHIN THE ENVELOPE, EXTERNAL TERMINALS SEALED IN THE ENVELOPE AND CONNECTED INTERNALLY TO THE ELECTRODE SYSTEM, SAID SEPARATING WALL PORTION CONSISTING OF ELECTRICALLY-INSULATING, GAS-TIGHT, VITREOUS BORIC ACID ANHYDRIDE, AND MEANS SURROUNDING THE SAID WALL PORTION OF BORIC ACID ANHYDRIDE AND PREVENTING MOISTURE FROM COMING INTO CONTACT THEREWITH.
References Cited (Backward Citations)
US2238777A
Cited
US2367595A
Cited
US2536991A
Cited
US2500941A
Cited
GB606013A
Cited
US2573999A
Cited
US2596080A
Cited
US2568459A
Cited
US2639389A
Cited
US2683234A
Cited
US2837678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |