US3711262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing optical waveguide fibers
Assignee: Corning Glass Works
•
Filing: 1970-05-11
•
Granted: 1973-01-16
•
Expires: 1990-05-11
Abstract
Abstract A METHOD OF PRODUCING AN OPTICAL WAVEGUIDE BY FIRST FORMING A FILM OF GLASS WITH A PRESELECTED INDEX OF REFRACTION ON THE INSIDE WALL OF A GLASS TUBE HAVING A DIFFERENT PRESELECTED INDEX OF REFRACTION. THIS GLASS TUBE AND GLASS FILM COMBINATION IS THEN DRAWN TO REDUCE THE CROSS-SECTIONAL AREA AND TO COLLAPSE THE FILM OF GLASS TO FORM A FIBER HAVING A SOLID CROSS-SECTIONAL AREA; THE CORE BEING FORMED FROM THE GLASS FILM, AND THE CLADDING BEING FORMED FROM THE GLASS TUBE.
Inventors
- 👤 D Keck
- 👤 P Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
C; C03; C03C; C03C21/00; C03B; C03B19/00; C03B19/01; C03B37/00; C03B37/01; C03B37/012; C03B37/01205; C03B37/014; C03B37/018; C03B37/01861; C03B37/01869; C03B37/02; C03B37/025; C03B37/027; C03C13/00; C03C13/04; C03C13/045; G; G02; G02B; G02B6/00; G02B6/02; C03B2201/00; C03B2201/06; C03B2201/30; C03B2201/32; C03B2201/40; C03B2201/42; C03B2203/00; C03B2203/10; C03B2203/22; C03B2203/24; C03B2205/00; C03B2205/12; C03B2205/16; Y; Y10; Y10S; Y10S501/00; Y10S501/90
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |