US2330950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic insulator and method of making the same
Assignee: Hartford National Bank and Trust Co
•
Filing: 1940-02-28
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Granted: 1943-10-05
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Expires: 1960-02-28
Abstract
No abstract record available.
Inventors
- 👤 Bugel Roelof Dirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46
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) | 1946-10-04 | 1947-04-05 | 1947-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-04 | 1951-04-05 | 1951-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-04 | 1955-04-05 | 1955-10-05 | $7700.00 | Window Closed / Lapsed |