Patent US2772334A successfully refreshed from Google Patents.
US2772334A
Expired / Lapsed
US
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Refractory body for electrical apparatus
Assignee: Merlin Gerin SA
•
Filing: 1952-03-08
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Granted: 1956-11-27
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Expires: 1972-03-08
Abstract
No abstract record available.
Inventors
- 👤 Latour Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:48
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/0038; H; H01; H01B; H01B3/00; H01H; H01H33/00; H01H33/70; H01H33/72; Y; Y10; Y10S; Y10S174/00; Y10S174/01
Claims Analysis
Total Claims: 0
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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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |