US2592434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive marker
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1942-04-10
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Granted: 1952-04-08
•
Expires: 1962-04-10
Abstract
No abstract record available.
Inventors
- 👤 Krasnow Shelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:24
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/36; E; E21; E21B; E21B47/00; E21B47/04; E21B47/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROJECTILE ADAPTED TO BE FIRED INTO AND TO BECOME LODGED IN A MATERIAL SO AS TO PERMIT THE SUBSEQUENT DETECTION THEREOF COMPRISING A PERMANENTLY MAGNETIZED PORTION, AND A PORTION CONTAINING RADIOACTIVE MATERIAL, THE MAGNETIZED PORTION SERVING AT LEAST IN PART AS A SUPPORT AND ENCLOSURE FOR THE RADIOACTIVE MATERIAL, THEREBY PROVIDING A PROJECTILE WHOSE PRESENCE MAY BE DETECTED BOTH BY MAGNETIC AND BY RADIOACTIVE MEANS.
Claim 2
Dependent Claim
66 words
A PROJECTILE ADAPTED TO BE FIRED INTO AND TO BECOME LODGED IN A MATERIAL SO AS TO PERMIT THE SUBSEQUENT DETECTION THEREOF COMPRISING A PERMANENTLY MAGNETIZED PORTION, AND A PORTION CONTAINING RADIOACTIVE MATERIAL, THE MAGNETIZED PORTION SERVING AT LEAST IN PART AS A SUPPORT AND ENCLOSURE FOR THE RADIOACTIVE MATERIAL, THEREBY PROVIDING A PROJECTILE WHOSE PRESENCE MAY BE DETECTED BOTH BY MAGNETIC AND BY RADIOACTIVE MEANS.
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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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |