US3125428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uethod for coating silica rods
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
•
Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:28
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C03C25/1061; C03C25/1062; C03C25/12; C03C25/22; C03C25/223; C03C25/42; C03C25/44; C04B41/45; C04B41/4584; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS OF PYROLYTIC DEPOSITION ON SILICA CONSISTING OF THE STEPS OF CONTINUOUSLY FEEDING A SILICA ROD OF PRESELECTED DIAMETER AT A SPECIFIC RATE INTO AN ADJUSTABLE HEATING FLAME, HEATING THE ROD UNTIL THE HEATED SECTION BECOMES VISOUS, DRAWING OUT A FIBER FROM THE VISCOUS SECTION, PASSING THE DRAWN FIBER IMMEDIATELY UPON EXIT FROM THE SHARPLY DEFINED HEATING ZONE COAXIALLY AND OPOSITIONALLY THROUGH A MOVING GASEOUS HYDROCARBON ENVIRONMENT FORMED FROM GASES FROM THE GROUP CONSISTING OF ACETYLENE, PROPANE, AND METHANE AND RETAINING THE DRAWN FIBER IN THE GASEOUS ENVIRONMENT UNTIL ITS TEMPERATURE HAS FALLEN BELOW THE DEGREEWHERE THE COATING WOULD BE REDUCED BY CONTACT WITH AIR.
Claim 2
Dependent Claim
106 words
A PROCESS OF PYROLYTIC DEPOSITION ON SILICA CONSISTING OF THE STEPS OF CONTINUOUSLY FEEDING A SILICA ROD OF PRESELECTED DIAMETER AT A SPECIFIC RATE INTO AN ADJUSTABLE HEATING FLAME, HEATING THE ROD UNTIL THE HEATED SECTION BECOMES VISOUS, DRAWING OUT A FIBER FROM THE VISCOUS SECTION, PASSING THE DRAWN FIBER IMMEDIATELY UPON EXIT FROM THE SHARPLY DEFINED HEATING ZONE COAXIALLY AND OPOSITIONALLY THROUGH A MOVING GASEOUS HYDROCARBON ENVIRONMENT FORMED FROM GASES FROM THE GROUP CONSISTING OF ACETYLENE, PROPANE, AND METHANE AND RETAINING THE DRAWN FIBER IN THE GASEOUS ENVIRONMENT UNTIL ITS TEMPERATURE HAS FALLEN BELOW THE DEGREEWHERE THE COATING WOULD BE REDUCED BY CONTACT WITH AIR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |