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Patent US2841071A successfully refreshed from Google Patents.
US2841071A
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Chimney construction
Assignee: Strawsine Manufacturing Co
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Filing: 1955-07-11
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Granted: 1958-07-01
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Expires: 1975-07-11
Abstract
No abstract record available.
Inventors
- 👤 Fern A Strawsine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:36
CPC Classifications
F; F23; F23J; F23J13/00; F23J13/02; F23J13/025; F23J11/00; F23J11/04; F23L; F23L17/00; F23L17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US89660A
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US314121A
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US2002020A
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GB189809294A
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US2275902A
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US2634720A
Cited
US2703520A
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US2687127A
Cited
US2695554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |