US2805651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to control smoke
Assignee: Individual
•
Filing: 1952-10-16
•
Granted: 1957-09-10
•
Expires: 1972-10-16
Abstract
No abstract record available.
Inventors
- 👤 Rudolph O Weihl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:46
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US586429A
Cited
US1070174A
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US1041617A
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US1082245A
Cited
US1117614A
Cited
US1269724A
Cited
US1296040A
Cited
US1747619A
Cited
US1769613A
Cited
US1990315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |