US3268313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming hollow glass fibers
Assignee: PPG Industries Inc
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Filing: 1965-06-09
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Granted: 1966-08-23
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Expires: 1985-06-09
Abstract
No abstract record available.
Inventors
- 👤 Jerome A Burgman
- 👤 Lester L Margason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:08
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/083; C03B37/01; C03B37/02; C03B37/022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A METHOD FOR PRODUCING A HOLLOW FIBER OF HEAT SOFTENABLE MATERIAL, SUCH AS GLASS, FROM A SOURCE OF SUCH MOLTEN MATERIAL WHICH INCLUDES THE STEPS OF FEEDING A STREAM OF SAID MATERIAL FROM SAID SOURCE THROUGH A TERMINUS OF SAID SOURCE, FLOWING A GAS INTO THE CENTRAL AREA OF SAID STREAM AT A DISTANCE OF MORE THAN 0.030 INCH AND LESS THAN 0.066 INCH BEYOND SAID TERMINUS OF SAID SOURCE AND ATTENUATING AND COOLING SAID STREAM TO PRODUCE A HOLLOW FIBER.
Claim 2
Independent Claim
81 words
A METHOD FOR PRODUCING A HOLLOW FIBER OF HEAT SOFTENABLE MATERIAL, SUCH AS GLASS, FROM A SOURCE OF SUCH MOLTEN MATERIAL WHICH INCLUDES THE STEPS OF FEEDING A STREAM OF SAID MATERIAL FROM SAID SOURCE THROUGH A TERMINUS OF SAID SOURCE, FLOWING A GAS INTO THE CENTRAL AREA OF SAID STREAM AT A DISTANCE OF MORE THAN 0.030 INCH AND LESS THAN 0.066 INCH BEYOND SAID TERMINUS OF SAID SOURCE AND ATTENUATING AND COOLING SAID STREAM TO PRODUCE A HOLLOW FIBER.
Claim 3
Dependent Claim
125 words
APPARATUS FOR PRODUCING HOLLOW FIBERS COMPRISING A SOURCE OF MOLTEN GLASS, A BUSHING HAVING A PLURALITY OF ORIFICES APPROXIMATELY 0.130 INCH IN DIAMETER THERETHROUGH FOR THE PASSAGE OF STREAMS OF GLASS FROM SAID SOURCE, A PLURALITY OF HOLLOW TUBES EACH EXTENDING INTO AN ORFICE AND BEING ARRANGED SUBSTANTIALLY CONCENTRICALLY WITH ITS RESPECTIVE ORIFICE, EACH TUBE EXTENDING BEYOND THE TERMINUM OF ITS RESPECTIVE ORIFICE A DISTANCE OF 0.030 INCH TO 0.066 INCH 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 AND INTO A CENTRAL AREA OF A GLASS STREAM SO AS TO FORM HOLLOW GLASS STREMS AND MEANS TO ATTENUATE SAID HOLLOW STREAMS OF GLASS INTO HOLLOW FIBERS.
Claim 4
Dependent Claim
125 words
APPARATUS FOR PRODUCING HOLLOW FIBERS COMPRISING A SOURCE OF MOLTEN GLASS, A BUSHING HAVING A PLURALITY OF ORIFICES APPROXIMATELY 0.130 INCH IN DIAMETER THERETHROUGH FOR THE PASSAGE OF STREAMS OF GLASS FROM SAID SOURCE, A PLURALITY OF HOLLOW TUBES EACH EXTENDING INTO AN ORFICE AND BEING ARRANGED SUBSTANTIALLY CONCENTRICALLY WITH ITS RESPECTIVE ORIFICE, EACH TUBE EXTENDING BEYOND THE TERMINUM OF ITS RESPECTIVE ORIFICE A DISTANCE OF 0.030 INCH TO 0.066 INCH 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 AND INTO A CENTRAL AREA OF A GLASS STREAM SO AS TO FORM HOLLOW GLASS STREMS AND MEANS TO ATTENUATE SAID HOLLOW STREAMS OF GLASS INTO HOLLOW FIBERS.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |