Patent BE502943A successfully refreshed from Google Patents.
Patent US3811852A successfully refreshed from Google Patents.
US3811852A
Expired / Lapsed
US
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Method of producing rolled porous glassceramic material
Assignee: Individual
•
Filing: 1972-08-22
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Granted: 1974-05-21
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Expires: 1992-08-22
Abstract
Abstract A method of founding glass melt accompanied by its simultaneous frothing at a temperature of from 1,500* to 1,530*C, preparing the glass melt at a viscosity of from 25 to 60 poises and crystallizing the molded glass ribbon in a two-step process at respective temperatures of 650*-700*C and 1,100*-1,150*C and respective crystallization times of 0.3-0.5 hr and 1.0-1.5 hr, with the temperature rising between the two steps of the process with a 1.3*C/min gradient.
Inventors
- 👤 K Bondarev
- 👤 N Pavlushkin
- 👤 I Tykachinsky
- 👤 V Kozlovsky
- 👤 V Krylov
- 👤 S Rud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:58
CPC Classifications
C; C03; C03B; C03B25/00; C03B25/04; C03B25/06; C03B25/08; C03B25/093; C03B13/00; C03B13/12; C03B18/00; C03B18/02; C03B18/16; C03B18/18; C03B18/20; C03B18/22; C03B19/00; C03B19/08; C03B32/00; C03B32/02; C03C; C03C10/00; C03C10/0036; C03C10/0045; C03C11/00; C03C11/007; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |