US3261471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquarium filter system
Assignee: Halvin Products Co Inc
•
Filing: 1962-05-23
•
Granted: 1966-07-19
•
Expires: 1982-05-23
Abstract
No abstract record available.
Inventors
- 👤 Halpert Abby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2676921A
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US2730496A
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US2729337A
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US2783893A
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US2737490A
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US2786026A
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US2877898A
Cited
US3135238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |