Patent US2643867A successfully refreshed from Google Patents.
US2643867A
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US
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Cupola stack or tower
Assignee: CLAUDE B SCHNEIBLE Co Inc
•
Filing: 1950-01-26
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Granted: 1953-06-30
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Expires: 1970-01-26
Abstract
No abstract record available.
Inventors
- 👤 Claude B Schneible
- 👤 Alvin S Lundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:13
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/12; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S55/00; Y10S55/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE18980E
Cited
US1604769A
Cited
US1926970A
Cited
US2041826A
Cited
US2387345A
Cited
US2380826A
Cited
US2496281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |