US3421873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing an intermittently hollow glass filament
Assignee: JEROME A BURGMAN
•
Filing: 1966-03-17
•
Granted: 1969-01-14
•
Expires: 1986-03-17
Abstract
No abstract record available.
Inventors
- 👤 Jerome A Burgman
- 👤 Lester L Margason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:00
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/022; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
APPARATUS FOR PRODUCING INTERMITTENT HOLLOW AND SOLID FIBERS COMPRISING A SOURCE OF MOLTEN GLASS, A BUSHING HAVING A PLURALITY OF ORIFICES THERETHROUGH FOR THE PASSAGE OF STREAMS OF GLASS FROM SAID SOURCE, A PLURALITY OF HOLLOW TUBES EACH EXTENDING INTO AN ORIFICE AND BEING ARRANGED SUBSTANTIALLY CONCENTRICALLY WITH ITS RESPECTIVE ORIFICES, EACH TUBE EXTENDING BEYOND THE TERMINUS OF ITS RESPECITIVE ORFICE AND RESTRICTING ITS RESPECTIVE ORIFICE TO AN ANNULUS, A SOURCE OF GAS, MEANS CONNECTING EACH HOLLOW TUBE TO SAID GAS SOURCE FOR DISCHARGE THROUGH EACH TUBE INTO A CENTRAL AREA OF A GLASS STREAM, MEANS TO INTERMITTENTLY SUPPLY GAS TO EACH TUBE SO AS TO FORM INTERMIT-
Claim 2
Dependent Claim
108 words
APPARATUS FOR PRODUCING INTERMITTENT HOLLOW AND SOLID FIBERS COMPRISING A SOURCE OF MOLTEN GLASS, A BUSHING HAVING A PLURALITY OF ORIFICES THERETHROUGH FOR THE PASSAGE OF STREAMS OF GLASS FROM SAID SOURCE, A PLURALITY OF HOLLOW TUBES EACH EXTENDING INTO AN ORIFICE AND BEING ARRANGED SUBSTANTIALLY CONCENTRICALLY WITH ITS RESPECTIVE ORIFICES, EACH TUBE EXTENDING BEYOND THE TERMINUS OF ITS RESPECITIVE ORFICE AND RESTRICTING ITS RESPECTIVE ORIFICE TO AN ANNULUS, A SOURCE OF GAS, MEANS CONNECTING EACH HOLLOW TUBE TO SAID GAS SOURCE FOR DISCHARGE THROUGH EACH TUBE INTO A CENTRAL AREA OF A GLASS STREAM, MEANS TO INTERMITTENTLY SUPPLY GAS TO EACH TUBE SO AS TO FORM INTERMIT-
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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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |