Patent US2998823A successfully refreshed from Google Patents.
US2998823A
Expired / Lapsed
US
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Apparatus for cleaning surfaces
Assignee: Libbey Owens Ford Glass Co
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Filing: 1956-05-15
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Granted: 1961-09-05
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Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 William E Mccown
- 👤 James W Mcauley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:23
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/04; B08B3/10; B08B3/12; B08B3/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1077818A
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US1566010A
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US2004422A
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US2373222A
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US2484014A
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GB687970A
Cited
DE902206C
Cited
US2784119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |