US2675456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of ice elimination systems
Assignee: AV Roe Canada Ltd
•
Filing: 1951-05-17
•
Granted: 1954-04-13
•
Expires: 1971-05-17
Abstract
No abstract record available.
Inventors
- 👤 James A C C Cleminson
- 👤 Hake Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:23
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1771273A
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US1775489A
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US2128361A
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US2316566A
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US2358406A
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US2541512A
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US2495792A
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US2568700A
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US2627012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |