US2972997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning surfaces
Assignee: Libbey Owens Ford Glass Co
•
Filing: 1956-04-09
•
Granted: 1961-02-28
•
Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 William E Mccown
- 👤 James W Mcauley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:11
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)
US399477A
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US936237A
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US1299624A
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US2248662A
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US2538242A
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US2811163A
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US2724666A
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US2802758A
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US2752271A
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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) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |