US2666840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: JOHN I HILL
•
Filing: 1951-06-08
•
Granted: 1954-01-19
•
Expires: 1971-06-08
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Poirier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:52
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/014; H05B2203/017; H05B2203/033; Y; Y10; Y10S; Y10S135/00; Y10S135/903
Claims Analysis
Total Claims: 0
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US2248655A
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US2404736A
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US2442132A
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US2496085A
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US2598940A
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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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |