Patent US2828019A successfully refreshed from Google Patents.
US2828019A
Expired / Lapsed
US
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Aquarium cleaning device
Assignee: Individual
•
Filing: 1955-01-07
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Granted: 1958-03-25
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Expires: 1975-01-07
Abstract
No abstract record available.
Inventors
- 👤 Robert A Lambertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:32
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US32815A
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US546883A
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US2065658A
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US2510427A
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US2636308A
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GB644693A
Cited
US2672987A
Cited
GB708284A
Cited
US2674574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |