US3077093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming glass fibers
Assignee: PPG Industries Inc
•
Filing: 1959-12-03
•
Granted: 1963-02-12
•
Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Clarence H Helbing
- 👤 Donald W Denniston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:47
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/06; C03B37/065; F; F23; F23C; F23C3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF FORMING GLASS FIBERS WHICH COMPRISES SUPPLYING AN ELONGATED BODY OF GLASS IN A FORM IN WHICH IT CAN BE ATTENUATED INTO FIBERS BY ENGAGEMENTS WITH A GASEOUS BLAST, BURNING A COMBUSTIBLE MIXTURE TO PRODUCE BURNED GASES IN A FIRST ZONE, MOVING THE BURNED GASES TO A SECOND ZONE, REDUCING THE TEMPERATURE OF THE BURNED GASES IN THE SECOND ZONE, CHANGING THE DIRECTION OF FLOW OF THE BURNED GASES AND DISCHARGING THE GASES TO ENGAGE THE ELONGATED BODY OF GLASS SO AS TO ATTENUATE IT INTO FIBERS.
Claim 2
Independent Claim
89 words
A METHOD OF FORMING GLASS FIBERS WHICH COMPRISES SUPPLYING AN ELONGATED BODY OF GLASS IN A FORM IN WHICH IT CAN BE ATTENUATED INTO FIBERS BY ENGAGEMENTS WITH A GASEOUS BLAST, BURNING A COMBUSTIBLE MIXTURE TO PRODUCE BURNED GASES IN A FIRST ZONE, MOVING THE BURNED GASES TO A SECOND ZONE, REDUCING THE TEMPERATURE OF THE BURNED GASES IN THE SECOND ZONE, CHANGING THE DIRECTION OF FLOW OF THE BURNED GASES AND DISCHARGING THE GASES TO ENGAGE THE ELONGATED BODY OF GLASS SO AS TO ATTENUATE IT INTO FIBERS.
References Cited (Backward Citations)
US2489243A
Cited
US2583736A
Cited
US2499218A
Cited
US2481543A
Cited
US2614619A
Cited
US2645814A
Cited
US2681696A
Cited
US2699631A
Cited
US2810157A
Cited
US2779661A
Cited
US2808254A
Cited
US2925620A
Cited
US2978744A
Cited
US2980952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |