US2270872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ceramic insulators
Assignee: Hartford National Bank and Trust Co
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Filing: 1938-03-11
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Granted: 1942-01-27
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Expires: 1958-03-11
Abstract
No abstract record available.
Inventors
- 👤 Goede Pieter
- 👤 Scheerman Leonardus Theodorus
- 👤 Marinus Gerard Van Bruggen
- 👤 Verwey Evert Johannes Willem
- 👤 Bugel Roelof Dirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:34
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/12; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; H01B19/00; Y; Y10; Y10S; Y10S264/00; Y10S264/25
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) | 1945-01-26 | 1945-07-28 | 1946-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-26 | 1949-07-28 | 1950-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-26 | 1953-07-28 | 1954-01-27 | $7700.00 | Window Closed / Lapsed |