Patent US3653385A successfully refreshed from Google Patents.
US3653385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of focal brain lesions by inductive heating
Assignee: Individual
•
Filing: 1970-10-20
•
Granted: 1972-04-04
•
Expires: 1990-10-20
Abstract
Abstract A metallic pellet or seed is physically implanted into the brain in a position where a brain lesion is to be produced. The seed is composed of a metallic alloy of predetermined composition capable of being inductively heated by radio frequency energy. By virtue of the composition of the alloy, the seed reaches but does not exceed a predetermined temperature, and the desired size and degree of lesion is controlled as a function of time during which the radio frequency field is in operation.
Inventors
- 👤 Charles Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:50
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/40; A61N1/403; A61N1/406; A61F; A61F2250/00; A61F2250/0001
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
In the method of producing a lesion in living brain tissue by inserting a thermoseed into the tissue in the area where the lesion is required, and subjecting said thermoseed to an externally produced radio frequency field, the improvement comprising: implanting in living brain tissue an electroseed formed of a metallic alloy having a physiologic Curie point of approximately 238* F. as measured in an albumin standard solution, and utilizing this implant to produce coagulative lesions in brain tissue in a temperature range of 110* through 212* F.
Claim 2
Dependent Claim
88 words
In the method of producing a lesion in living brain tissue by inserting a thermoseed into the tissue in the area where the lesion is required, and subjecting said thermoseed to an externally produced radio frequency field, the improvement comprising: implanting in living brain tissue an electroseed formed of a metallic alloy having a physiologic Curie point of approximately 238* F. as measured in an albumin standard solution, and utilizing this implant to produce coagulative lesions in brain tissue in a temperature range of 110* through 212* F.
Claim 3
Dependent Claim
54 words
As a new article of manufacture, a brain implant for producing coagulative lesions composed of a metallic alloy, said alloy comprising at least 18 percent nickel by weight and the balance selected from the group consisting of chromium, palladium iron and copper and having a Curie point in air between 250* and 300* F.
Claim 4
Dependent Claim
54 words
As a new article of manufacture, a brain implant for producing coagulative lesions composed of a metallic alloy, said alloy comprising at least 18 percent nickel by weight and the balance selected from the group consisting of chromium, palladium iron and copper and having a Curie point in air between 250* and 300* F.
Claim 5
Dependent Claim
21 words
A brain implant in accordance with claim 2, composed of an alloy comprising 18 to 24 percent by weight of nickel.
Claim 6
Dependent Claim
23 words
An electroseed in accordance with claim 2, composed of an alloy consisting of approximately 78.7 percent palladium by weight, and the balance nickel.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |