US2443594A
Expired / Lapsed
US
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Apparatus for heating dielectric materials
Assignee: AT&T Inc
•
Filing: 1943-04-02
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Granted: 1948-06-22
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Expires: 1963-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jacob R Boettler
- 👤 Burns Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:00
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/72; B29C45/74; B29C48/00; B29C48/022; B29C48/03; B29C48/05; B29C48/06; B29K; B29K2101/00; B29K2101/10; B29K2301/00; B29K2301/10; Y; Y10; Y10S; Y10S264/00; Y10S264/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1522188A
Cited
US1933528A
Cited
GB517798A
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US2296948A
Cited
US2309496A
Cited
US2370883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |