US3333933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bushing assembly for forming glass fibers
Assignee: PPG Industries Inc
•
Filing: 1965-01-13
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Granted: 1967-08-01
•
Expires: 1985-01-13
Abstract
No abstract record available.
Inventors
- 👤 Paul H Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:15
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/083; C03B37/01; C03B37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
IN APPARATUS FOR PRODUCING VITREOUS FIBERS INCLUDING A BUSHING ASSEMBLY HAVING OPENINGS THROUGH WHICH VITREOUS MATERIAL FLOWS AND FORMS CONES FROM WHICH FIBERS ARE DRAWN, THE IMPROVEMENT WHICH COMPRISES, SELF CONTAINED MEANS FOR REFLECTING HEAT RADIATED BY SAID CONES BACK TO SAID CONES, SAID MEANS INCLUDING ANGLED PORTIONS OF THE BUSHING ASSEMBLY.
Claim 2
Dependent Claim
52 words
IN APPARATUS FOR PRODUCING VITREOUS FIBERS INCLUDING A BUSHING ASSEMBLY HAVING OPENINGS THROUGH WHICH VITREOUS MATERIAL FLOWS AND FORMS CONES FROM WHICH FIBERS ARE DRAWN, THE IMPROVEMENT WHICH COMPRISES, SELF CONTAINED MEANS FOR REFLECTING HEAT RADIATED BY SAID CONES BACK TO SAID CONES, SAID MEANS INCLUDING ANGLED PORTIONS OF THE BUSHING ASSEMBLY.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |