US3773871A
Expired / Lapsed
US
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Method for forming implantable capsules with silicone rubber
Assignee: CRONKHITE L
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Filing: 1971-11-19
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Granted: 1973-11-20
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Expires: 1991-11-19
Abstract
Abstract A CAPSULE FILLED WITH A MEDICAMENT IS FORMED BY FIRST SELECTIVELY CROSS-LINKING WITH IONIZING RADIATION A SILICONE COMPOSITION TO FORM A CROSS-LINKED RECESS SURROUNDED BY UNCROSS-LINKED SILICON. THE RECESS THEN IS FILLED WITH MEDICAMENT. THE UNCROSSLINKED PORTION IS JOINED, EITHER WITH ITSELF OR WITH THE UNCROSSLINKED PORTION OF A MATING, PARTIALLY CROSSLINKED SECTION AND SUBJECTING JUST THE UNCROSSLINKED PORTION TO IONIZING RADIATION TO EFFECT CROSSLINKING THEREOF.
Inventors
- 👤 E Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/4816; A61J; A61J3/00; A61J3/07; A61K9/0012; A61K9/0034; A61K9/0039; A61K9/4808; A61L; A61L29/00; A61L29/04; A61L29/06; A61M; A61M25/00; A61M25/0043; A61M25/0045; A61M2025/0046; Y; Y10; Y10S; Y10S264/00; Y10S264/37
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |