US3582297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a fiber-optical element
Assignee: US Philips Corp
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Filing: 1967-08-28
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Granted: 1971-06-01
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Expires: 1987-08-28
Abstract
Abstract IN THE METHOD OF MANUFACTURING A FIBER-OPTICAL ELEMENT IN WHICH A ROD-SHAPED GLASS BODY HAVING A HIGH REFRACTIVE INDEX AND CONTAINING A SMALL QUANTITY OF MONOVALENT IONS SURROUNDED BY A GLASS SHEATH OF LOW REFRACTIVE INDEX AFTER BEING DRAWN INTO GLASS FIBERS WHICH ARE ASSEMBLED INTO A BODY WHICH IS AGAIN DRAWN TO REDUCE ITS SIZE AND THE FIBERS FUSED INTO A COMPACT STACK WITH MINIMUM DEFORMATION, THE MONOVALENT IONS ARE EXCHANGED FOR OTHER IONS WHICH INCREASE THE LIGHT ABSORPTION BY THE SHEATH.
Inventors
- 👤 Henricus Theophile Pet Lakeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:17
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5085; B01L3/50857; C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/025; C03B37/028; C03B37/10; C03B37/14; C03B37/15; C03C; C03C21/00; G; G02; G02B; G02B6/00; G02B6/04; G02B6/06; G02B6/08; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/901
Claims Analysis
Total Claims: 0
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |