Patent US2815880A successfully refreshed from Google Patents.
US2815880A
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Assignee: AO Smith Corp
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Filing: 1955-03-17
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Granted: 1957-12-10
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Expires: 1975-03-17
Abstract
No abstract record available.
Inventors
- 👤 Albert V Blatz
- 👤 Howard H Needham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:58
CPC Classifications
B; B65; B65D; B65D19/00; B65D19/02; B65D19/06; B65D19/08; B65D19/12; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00024; B65D2519/00049; B65D2519/00064; B65D2519/00154; B65D2519/00164; B65D2519/00258; B65D2519/00283; B65D2519/00288; B65D2519/00313; B65D2519/00328; B65D2519/00338; B65D2519/00398; B65D2519/00402; B65D2519/00407; B65D2519/00422; B65D2519/00492; B65D2519/00502; B65D2519/00547; B65D2519/00577; B65D2519/00582; B65D2519/00611; B65D2519/00636; B65D2519/00641; B65D2519/00646; B65D2519/00656; B65D2519/00736; B65D2519/00865; B65D2519/00875; B65D2519/009; B65D2519/00935; B65D2519/00955; B65D2519/00965; B65D2519/00975
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1206090A
Cited
US1686222A
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US1671051A
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GB650264A
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US2658647A
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US2643788A
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US2717093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |