US3530499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated appliance unit
Assignee: Individual
•
Filing: 1969-09-29
•
Granted: 1970-09-22
•
Expires: 1989-09-29
Abstract
No abstract record available.
Inventors
- 👤 Charles F Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:55
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/12; H05B6/1209; H05B6/1236; H05B3/00; H05B3/68; H05B3/685; Y; Y10; Y10S; Y10S336/00; Y10S336/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US457561A
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US607093A
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FR767905A
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US932242A
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US1415456A
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US2404147A
Cited
US2374662A
Cited
GB621926A
Cited
US2773161A
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US2916593A
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US3265851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |