Patent US5423817A successfully refreshed from Google Patents.
US2220412A
Expired / Lapsed
US
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Refractory and method of making same
Assignee: Tam Ceramics LLC
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Filing: 1940-04-13
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Granted: 1940-11-05
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Expires: 1960-04-13
Abstract
No abstract record available.
Inventors
- 👤 Charles J Kinzie
- 👤 Wainer Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/01; C04B35/14; C04B35/48; C04B35/481; C04B35/632; C04B35/66; C04B2111/00; C04B2111/00474; C04B2111/00836; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3231; C04B2235/3244; C04B2235/34; C04B2235/3427
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) | 1943-11-05 | 1944-05-06 | 1944-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-05 | 1948-05-06 | 1948-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-05 | 1952-05-06 | 1952-11-05 | $7700.00 | Window Closed / Lapsed |