Patent US3991770A successfully refreshed from Google Patents.
US3991770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating benign and malignant tumors utilizing radio frequency, electromagnetic radiation
Assignee: Individual
•
Filing: 1975-12-23
•
Granted: 1976-11-16
•
Expires: 1995-12-23
Abstract
Abstract A method of treating tumors, both benign and malignant, such as carcinoma, sarcoma, cysts and avascular lesions, in animals, such as humans, by radio frequency heating at the location of the tumor in the host with intensity and duration sufficient to cause necrosis of the tumor tissue. Substantial damage to the surrounding normal tissue is avoided, as the surrounding normal tissue is cooled by blood flow which carries the heat away to dissipate such heat in those portions of the body not being subjected to heating.
Inventors
- 👤 Harry H. Leveen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:47
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/06; A61N1/40; A61N1/403
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
A method of treating a naturally occurring tumor in a human which comprises placing the portion of the body of the human in which the tumor is located in a radio frequency electromagnetic field thereby to heat the tumor tissue in said portion of said body by absorption of energy from said radio frequency electromagnetic field for a period of time and with intensity sufficient to cause necrosis of said tumor, but insufficient to cause significant damage to the adjacent normal tissue in said field.
Claim 2
Independent Claim
85 words
A method of treating a naturally occurring tumor in a human which comprises placing the portion of the body of the human in which the tumor is located in a radio frequency electromagnetic field thereby to heat the tumor tissue in said portion of said body by absorption of energy from said radio frequency electromagnetic field for a period of time and with intensity sufficient to cause necrosis of said tumor, but insufficient to cause significant damage to the adjacent normal tissue in said field.
Claim 3
Dependent Claim
54 words
The method of claim 1 in which the body portion is placed in a radio frequency field by positioning insulated, conductive metal plates in intimate contact with the portion of the body containing the tumor such that the tumor lies between the conductive metal plates, and applying radio frequency electrical power across said plates.
Claim 4
Dependent Claim
53 words
The method according to claim 2 in which the power level of radio frequency electrical power applied across said conductive metal plates is between 50 and 250 watts, in which the time of application is between 10 and 20 minutes and in which said plates are from 2 to 4 inches in diameter.
Claim 5
Dependent Claim
34 words
The method according to claim 1 in which thetemperature of said tumor is raised above 46° C and in which the temperature of the normal tissue adjacent the tumor is kept below 40° C.
References Cited (Backward Citations)
GB353231A
Cited
US2223447A
Cited
US2407690A
Cited
GB618179A
Cited
US3181535A
Cited
US3245408A
Cited
DE1284528B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |