Patent US3572292A successfully refreshed from Google Patents.
US3572292A
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US
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Artificial oyster cultches
Assignee: Canadian Patents and Development Ltd
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Filing: 1969-06-27
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Granted: 1971-03-23
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Expires: 1989-06-27
Abstract
Abstract AN ARTIFICIAL OYSTER CLUTCH MADE UP OF A THIN BODY OF ANY DESIRED SHAPE, HAVING OPPOSITE FACE SIDES WITH BEARING SURFACE MEANS ON ONE SIDE, AND SPACER MEANS PROJECTING FROM THE OPPOSITE SIDE THEREOF AND ADAPTED TO BEAR AGAINST THE BEARING SURFACE MEANS OF THE BODY OF ANOTHER CULUTH WHEN THE CLUTCHES ARE OPERATIVELY PLACED TOGETHER. THE BEARING SURFACE MEANS AND THE SPACER MEANS ARE POSITIONED TO KEEP MOST OF THE CULTCH BODIES SEPARATED FROM EACH OTHER WHEN THEY ARE IN OPERATIVE POSITIONS, USUALLY IN A VERTICAL COLUMN INCLUDING A PLURALITY OF CULTCHES HELD TOGETHER ON A WIRE OR STRING.
Inventors
- 👤 Daniel B Quayle
- 👤 Trevor P Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:22
CPC Classifications
A; A01; A01K; A01K61/00; A01K61/50; A01K61/54; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02A40/81
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |