US3151964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing fused silica
Assignee: Glasrock Products Inc
•
Filing: 1958-06-10
•
Granted: 1964-10-06
•
Expires: 1978-06-10
Abstract
No abstract record available.
Inventors
- 👤 John W North
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:05
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/02; C03B5/025; Y; Y10; Y10S; Y10S65/00; Y10S65/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
IN A PROCESS OF MELTING A MATERIAL WHICH HAS A RELATIVELY HIGH VISCOSITY WHEN MOLTEN, DISPOSING A PAIR OF GAS FORMING ELECTRODES ADJACENT AND IN OPPOSED CONDITION WITH RESPECT TO EACH OTHER, DISPOSING SAID MATERIAL AROUND SAID ELECTRODES SUCH THAT AN APPRECIABLE AMOUNT OF MATERIAL IS BENEATH THE OPPOSED ENDS OF SAID ELECTRODES, CREATING AN ELECTRICAL DISCHARGE ACROSS SAID ELECTRODES TO MELT A PORTION OF SAID MATERIAL TO CREATE A GAS FILLED HOLLOW
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |