Patent US2531612A successfully refreshed from Google Patents.
US2531612A
Expired / Lapsed
US
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Method for melting glass by electricity
Assignee: Compagnie de Saint Gobain SA
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Filing: 1945-03-20
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Granted: 1950-11-28
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Expires: 1965-03-20
Abstract
No abstract record available.
Inventors
- 👤 Crochet Pierre
- 👤 Lambert Roger Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:49
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/02; C03B5/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1084856A
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US1099113A
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US1267317A
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US1939913A
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US1680163A
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US1970112A
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US2181030A
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US2208586A
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GB603252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |