US3659600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically operated capsule for administering drugs
Assignee: Boston Children's Hospital
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Filing: 1970-02-24
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Granted: 1972-05-02
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Expires: 1990-02-24
Abstract
Abstract An implantable capsule for delivering drugs when subjected to a magnetic force outside the body and controlled by the patient. The capsule has a means movable under a magnetic force to effect contact of the medicament in the capsule with a drug-permeable wall. When contacted, the drug diffuses through the wall into the body. When it is desired to cease drug administration, the capsule is subjected to an opposite magnetic force to seal the permeable wall from contact with the drug.
Inventors
- 👤 Edward W Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:29
CPC Classifications
A; A61; A61M; A61M31/00; A61M31/002
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A capsule suitable for implantation in the human body which comprise a wall, end sections attached to said wall to define a closed hollow chamber, a medicament within said chamber, a portion of said wall being formed of a permeable cross-linked elastomeric composition, an open hollow magnet in said chamber being movable under a magnetic force to seal or expose the permeable wall portion to the medicament, and a spring means in said chamber between said magnet and one of said end sections biasing said magnet toward a position to effect sealing of said permeable wall portion from said chamber.
Claim 2
Dependent Claim
100 words
A capsule suitable for implantation in the human body which comprise a wall, end sections attached to said wall to define a closed hollow chamber, a medicament within said chamber, a portion of said wall being formed of a permeable cross-linked elastomeric composition, an open hollow magnet in said chamber being movable under a magnetic force to seal or expose the permeable wall portion to the medicament, and a spring means in said chamber between said magnet and one of said end sections biasing said magnet toward a position to effect sealing of said permeable wall portion from said chamber.
Claim 3
Dependent Claim
16 words
The capsule of claim 1 wherein the permeable wall is formed of a cross-linked silicone rubber.
Claim 4
Dependent Claim
16 words
The capsule of claim 1 wherein the permeable wall portion is provided with a reinforcing means.
References Cited (Backward Citations)
US3118439A
Cited
US3093831A
Cited
US3279996A
Cited
US3315660A
Cited
US3419008A
Cited
US3485235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |