US2788170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquarium aerator
Assignee: Individual
•
Filing: 1953-11-02
•
Granted: 1957-04-09
•
Expires: 1973-11-02
Abstract
No abstract record available.
Inventors
- 👤 Kato Kazuharu
- 👤 Ochiai Shigeru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:34
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/225; A; A01; A01K; A01K63/00; A01K63/04; A01K63/042; F04B11/00; F04B11/0091; F04B45/00; F04B45/04; F04B45/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |