Patent US2471802A successfully refreshed from Google Patents.
US2471802A
Expired / Lapsed
US
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Apparatus for heat-treating air-pervious strip material
Assignee: Individual
•
Filing: 1945-11-16
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Granted: 1949-05-31
•
Expires: 1965-11-16
Abstract
No abstract record available.
Inventors
- 👤 Harold J Walter
- 👤 Paul R Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:34
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/101; B; B41; B41F; B41F23/00; B41F23/04; B41F23/0403; B41F23/0423; B41F23/0426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1670991A
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US1965229A
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US1881404A
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US2061976A
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US2119261A
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US2134544A
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US2306019A
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US2286731A
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US2378703A
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US2388226A
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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) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |