US3300288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of glass fibers
Assignee: PPG Industries Inc
•
Filing: 1965-10-22
•
Granted: 1967-01-24
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Jack R Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:39
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/0203; C03B37/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN THE METHOD OF PRODUCING GLASS FIBERS FROM A BODY OF MOLTEN GLASS WHEREIN A PORTION OF SAID MOLTEN GLASS IS WITHIN AN ELECTRICALLY HEATED BUSHING HAVING ORIFICES THEREIN THROUGH WHICH SAID MOLTEN GLASS FLOWS AND FORMS INVERTED MOLTEN GLASS CONES, THE GLASS FIBERS BEING DRAWN FROM THE INVERTED MOLTEN GLASS CONES, SAID MOLTEN GLASS CONES BEING SURROUNDED BY A FLUID MEDIUM IN HEAT EXCHANGE RELATION THEREWITH, SAID FLUID MEDIUM ADJACENT SAID MOLTEN GLASS CONES BEING IN A RELATIVELY QUIESCENT STATE, THE IMPROVEMENT COMPRISING, SUBJECTING SAID FLUID MEDIUM SURROUNDING SAID MOLTEN GLASS CONES TO PERIODIC VIBRATIONS, SAID VIBRATIONS BEING OF PREDETERMINED FREQUENCY BETWEEN 16,000 AND 45,000 CYCLES PER SECOND AND AN INTENSITY OF 136 DECIBELS AND ABOVE TO IMPART CONTROLLED TURBULENCE TO SAID FLUID MEDIUM SURROUNDING SAID MOLTEN GLASS CONES, SAID CONTROLLED TURBULENCE INCREASING THE RATE OF HEAT TRANSFER BETWEEN SAID MOLTEN GLASS CONES AND SAID FLUID MEDIUM.
Claim 2
Dependent Claim
148 words
IN THE METHOD OF PRODUCING GLASS FIBERS FROM A BODY OF MOLTEN GLASS WHEREIN A PORTION OF SAID MOLTEN GLASS IS WITHIN AN ELECTRICALLY HEATED BUSHING HAVING ORIFICES THEREIN THROUGH WHICH SAID MOLTEN GLASS FLOWS AND FORMS INVERTED MOLTEN GLASS CONES, THE GLASS FIBERS BEING DRAWN FROM THE INVERTED MOLTEN GLASS CONES, SAID MOLTEN GLASS CONES BEING SURROUNDED BY A FLUID MEDIUM IN HEAT EXCHANGE RELATION THEREWITH, SAID FLUID MEDIUM ADJACENT SAID MOLTEN GLASS CONES BEING IN A RELATIVELY QUIESCENT STATE, THE IMPROVEMENT COMPRISING, SUBJECTING SAID FLUID MEDIUM SURROUNDING SAID MOLTEN GLASS CONES TO PERIODIC VIBRATIONS, SAID VIBRATIONS BEING OF PREDETERMINED FREQUENCY BETWEEN 16,000 AND 45,000 CYCLES PER SECOND AND AN INTENSITY OF 136 DECIBELS AND ABOVE TO IMPART CONTROLLED TURBULENCE TO SAID FLUID MEDIUM SURROUNDING SAID MOLTEN GLASS CONES, SAID CONTROLLED TURBULENCE INCREASING THE RATE OF HEAT TRANSFER BETWEEN SAID MOLTEN GLASS CONES AND SAID FLUID MEDIUM.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |