Patent US3558766A successfully refreshed from Google Patents.
US3558766A
Expired / Lapsed
US
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Process for preserving biological specimens
Assignee: HAROLD L HALPERT
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Filing: 1965-09-30
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Granted: 1971-01-26
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Expires: 1985-09-30
Abstract
Abstract A PROCESS FOR EMBEDDING A BIOLOGICAL SPECIMEN IN PLASTIC TO AVOID HANDLING A DRY FRAGILE SPECIMEN. IN ONE FORM OF THE INVENTION THE SPECIMEN IS SUPPORTED IN LUMPS OF PLASTIC AND IS DRIED WHILE SO SUPPORTED. THE LUMPS ARE THEN PARTIALLY DISSOLVED BY A MONOMER OF THE PLASTIC AND THEN POLYMERIZED. IN A SECOND FORM OF THE INVENTION THE SPECIMEN IS SUPPORTED AND DRIED ON A SHEET OF PLASTIC AND THEN A MIXTURE OF A MONOMER AND POLYMER IS POURED OVER THE SPECIMEN AND THE MIXTURE POLYMERIZED.
Inventors
- 👤 Harold L Halpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:27
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/02; B29C39/10
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |