US3794475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing soluble silicate flakes or fibers
Assignee: PQ Corp
•
Filing: 1973-04-18
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Granted: 1974-02-26
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Expires: 1993-04-18
Abstract
Abstract FINE PARTICULATE GLASS, A SIGNIFICANT PORTION OF WHICH CAN BE IN THE FORM OF FINE SHORT FIBERS OR FLAKES, IS PRODUCED BY PASSING A MOLTEN SILICATE GLASS AT A CAREFULLY REGULATED VISCOSITY IN THE RANGE OF FROM ABOUT 500 TO ABOUT 10,000 POISES ACROSS A NOZZLE HAVING A HORIZONTAL SLIT-LIKE ORIFICE WHILE SIMULTANEOUSLY PASSING A PRESSURIZED GAS THROUGH THE ORIFICE AND AGAINST THE MOLTEN GLASS IN ORDER TO ATOMIZE THE MOLTEN GLASS TO A FINE PARTICULATE MASS.
Inventors
- 👤 F Lazet
- 👤 J Ahern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:32
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/005; C03B37/01; C03B37/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |