US5197940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Local application tumor treatment apparatus
Assignee: HYPERTHERM CORP A CORP OF MINNESOTA
•
Filing: 1990-01-29
•
Granted: 1993-03-30
•
Expires: 2010-01-29
Abstract
Abstract Disclosed is apparatus and method for treating prostate tumors. The apparatus includes a platform on which the patient may be seated. An electromagnetic coil is disposed beneath the platform and creates a field that acts on thermoseeds placed in the tumor. The method includes inductively heating the thermoseeds which heat the tumor cells to a temperature of between 45° and 50° C.
Inventors
- 👤 Chester E. Sievert
- 👤 Robert D. Tucker
- 👤 Stefen Loening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:58
CPC Classifications
A; A61; A61N; A61N2/00; A61N1/00; A61N1/40; A61N1/403; A61N1/406
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
An apparatus for the treatment of prostate cancer, said apparatus comprising a platform for the support of a person having a prostate tumor and a coil formed of electrically conductive tubing, said platform having a seat with an upper surface, said upper surface being positioned within 4 cm of the uppermost turn of said coil, said upper surface being contoured for reproducibly receiving the buttocks of a person in alignment with the axis of said coil.
Claim 2
Independent Claim
76 words
An apparatus for the treatment of prostate cancer, said apparatus comprising a platform for the support of a person having a prostate tumor and a coil formed of electrically conductive tubing, said platform having a seat with an upper surface, said upper surface being positioned within 4 cm of the uppermost turn of said coil, said upper surface being contoured for reproducibly receiving the buttocks of a person in alignment with the axis of said coil.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 wherein said apparatus further comprises a power source, said power source and said coil being capable of producing a magnetic field strength of 5 to 150 oersteds.
Claim 4
Dependent Claim
29 words
The apparatus of claim 2 wherein said coil has a diameter of from generally 20 cm to 65 cm and a length of generally 15 cm to 45 cm.
Claim 5
Dependent Claim
17 words
The apparatus of claim 3 wherein said coil is of copper tubing and has generally 50 turns.
Claim 6
Dependent Claim
25 words
The apparatus of claim 4 wherein said coil has a working field volume of generally 20 cm in diameter and generally 15 cm in height.
Claim 7
Dependent Claim
21 words
The apparatus of claim 5 wherein said platform is a chair-like structure on which the person may be seated during treatment.
Claim 8
Dependent Claim
25 words
The apparatus of claim 4 wherein said coil has a working field that extends about 20 cm above the upper most turn of the coil.
Claim 9
Dependent Claim
38 words
The apparatus of claim 6 wherein said platform is concave and extends downwardly into the center of the diameter of the coil, whereby the seat upper surface is positioned well within the field of the coil during treatment.
References Cited (Backward Citations)
US435376A
Cited
US477495A
Cited
US485238A
Cited
US561448A
Cited
US636093A
Cited
US849653A
Cited
US1120964A
Cited
US1164356A
Cited
US1375050A
Cited
US1418903A
Cited
US3653385A
Cited
US4106488A
Cited
US4537181A
Cited
US4316453A
Cited
US4574782A
Cited
US4590922A
Cited
US4983159A
Cited
US4874916A
Cited
US4923437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |