Patent US3576643A successfully refreshed from Google Patents.
US3576643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of culturing fish and crustacea larvae
Assignee: Individual
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Filing: 1969-03-28
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Granted: 1971-04-27
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Expires: 1989-03-28
Abstract
Abstract COVERS A FEED USEFUL IN CULTRUING LARVAL FISH AND CRUSTACEA WHICH COMPRISES A COMBINATION OF STARCH AND AN EXTRACT OF YEAST, DERIVED BY TREATING YEAST WITH AMMONIA OR A SIMILAR BASIC SUBSTANCE, SAID FEED ACTING AS A MEANS OF CULTURING ZOOPLANKTON WHICH ARE ASSIMILATED BY SAID LARVAL FISH AND CRUSTACEA. ALSO COVERS A METHOD OF CULTURING LARVAL FISH AND CRUSTACEA BY SUPPLYING THE ABOVE FEED TO THE AQUEOUS ENVIRONMENT IN WHICH THE LARVAE RESIDE.
Inventors
- 👤 Yaichi Ayukawa
- 👤 Uhei Naruse
- 👤 Tadayoshi Itoh
- 👤 Tsuneaki Miyakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:05
CPC Classifications
A; A23; A23K; A23K50/00; A23K50/80; A23K10/00; A23K10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |