Patent US3429972A successfully refreshed from Google Patents.
US3429972A
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US
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Very high temperature electric melting furnace
Assignee: Verreries Pochet et du Courval SA
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Filing: 1967-03-20
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Granted: 1969-02-25
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Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Jacques Marie Yves Le Cl Bussy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:50
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/167; C03B5/1672; C03B5/1675; C03B5/02; C03B5/027; C03B5/0275; C03B5/26; C03B7/00; C03B7/08; C03B7/088; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
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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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |