Patent US3767759A successfully refreshed from Google Patents.
US3767759A
Expired / Lapsed
US
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Method of molding capillary drain for surgery
Assignee: Czech Academy of Sciences
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Filing: 1971-05-19
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Granted: 1973-10-23
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Expires: 1991-05-19
Abstract
Abstract METHOD OF MOLDING A CAPILLARY DRAIN CONSISTING OF A FLAT BUNDLE OF CAPILLARIES MADE FROM HYHDROGELS AND SUITABLE PARTICULARLY FOR TREATING GLAUCOMA IN OPHTHALMOLOGY WHEREIN THE DRAIN IS MANUFACTURED SO THAT A SYSTEM OF PARALLEL FIBERS OR FILAMENTS IS LAID BETWEEN PARALLEL PLATES SEPARATED FROM EACH OTHER BY FLAT THIN SEPARATING INSERTS OR GASKETS. AN INITIATED MONOMER MIXTURE SUITABLE PRODUCING WATER-SWELLABLE CROSS-LINKED HYDROGELS IS FILLED INTO THE MOLD OBTAINED AND THE MONOMER MIXTURE IS POLYMERIZED UNDER CROSS-LINKING CONDITIONS. THE MOLD IS DISMOUNTED AND THE FIBERS OR FILAMENTS ARE REMOVED BY DISSOLVING OR MELTING OR PULLING THEM OUT.
Inventors
- 👤 O Wichterle
- 👤 L Krejci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61F; A61F9/00; A61F9/007; A61F9/00781; A61L; A61L29/00; A61L29/14; A61L29/145; A61M27/00
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |