US3535481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency induction heating of semiconductive plastics
Assignee: Plastics Engineering Co
•
Filing: 1969-03-24
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Granted: 1970-10-20
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Expires: 1989-03-24
Abstract
No abstract record available.
Inventors
- 👤 Louis L Korb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:05
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; B; B29; B29C; B29C65/00; B29C65/02; B29C65/14; B29C65/1403; B29C65/1425; B29C65/34; B29C65/36; B29C65/3604; B29C65/3608; B29C65/3612; B29C65/3644; B29C65/3672; B29C65/3676; B29C65/368; B29C66/00; B29C66/70; B29C66/73; B29C66/737; B29C66/7375; B29C66/73751; B29C66/90; B29C66/91; B29C66/914; B29C66/9161; B29C66/91651; B29C65/3684; B29C65/3696; B29C66/71; B29C66/739; B29C66/7392; B29C66/7394; B29C66/912; B29C66/9121; B29C66/91221
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) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |