US2982530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for operating ceramic kilns
Assignee: Individual
•
Filing: 1957-02-27
•
Granted: 1961-05-02
•
Expires: 1977-02-27
Abstract
No abstract record available.
Inventors
- 👤 Erik W Drakengren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:01
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/30; F27B9/36; F27B9/14; F27B9/20; F27B9/26; F27B9/262; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |