US4067709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical transmission line
Assignee: Individual
•
Filing: 1976-05-03
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Granted: 1978-01-10
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Expires: 1996-05-03
Abstract
Abstract A flexible hollow glass tube of optical fiber dimensions provides a central light passage and serves as an optical transmission line characterized by substantially less absorption and distortion of signals superposed on transmitted light waves. A metal rod located within a preform evaporates as the preform is heated and drawn, providing a convenient method of reflectively coating the internal surface of small tubes.
Inventors
- 👤 Austin N. Stanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:22
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/047; C03B37/00; C03B37/01; C03B37/02; C03B37/025; C03B37/027; C03C; C03C17/00; C03C17/06; C03C17/09; G; G02; G02B; G02B6/00; G02B6/02; G02B6/032; C03B2203/00; C03B2203/10; C03B2203/14; C03B2203/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
A process of continuously drawing heated preform glass tube in encircling heat radiating relation to an internal source of light reflecting evaporable metal rod to produce a hollow tube having an internal surface coating of light reflecting material drawn simultaneously with the tube.
Claim 2
Dependent Claim
43 words
A process of continuously drawing heated preform glass tube in encircling heat radiating relation to an internal source of light reflecting evaporable metal rod to produce a hollow tube having an internal surface coating of light reflecting material drawn simultaneously with the tube.
Claim 3
Dependent Claim
37 words
A process as defined in claim 1 wherein heat is applied to an intermediate annular zone of the preform glass tube to provide the hollow tube with end portions of larger diameter than its intermediate length portion.
Claim 4
Independent Claim
67 words
A method of making an optical transmission line comprising maintaining a large diameter annular zone of a preform glass tube at drawing temperature, supporting a rod of evaporable light reflecting metal rods within the annular zone, evaporating the light reflecting material while drawing the ductile glass from the annular zone into a hollow tube to provide an internal light reflective coating on the tube drawn simultaneously therewith.
Claim 5
Independent Claim
67 words
A method of making an optical transmission line comprising maintaining a large diameter annular zone of a preform glass tube at drawing temperature, supporting a rod of evaporable light reflecting metal rods within the annular zone, evaporating the light reflecting material while drawing the ductile glass from the annular zone into a hollow tube to provide an internal light reflective coating on the tube drawn simultaneously therewith.
References Cited (Backward Citations)
CA773059A
Cited
US3395366A
Cited
US3440620A
Cited
US3535023A
Cited
US3558377A
Cited
US3971645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |