Patent US3146340A successfully refreshed from Google Patents.
US3146340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating devices
Assignee: Baird Atomic Inc
•
Filing: 1961-08-21
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Granted: 1964-08-25
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Ii Davis R Dewey
- 👤 Kopito Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:36
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/007; H05B2203/017; H05B2203/028; H05B2203/033
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |