US3247602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze drying tray and method of manufacturing the same
Assignee: Pennwalt Corp
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Filing: 1963-02-13
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Granted: 1966-04-26
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 William H Hamilton
- 👤 Alessandro Dominic E D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:40
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF MANUFACTURING A TRAY COMPRISING THE STEPS OF EXTRUDING MATERIAL TO FROM INTEGRAL SUBSTANTIALLY PERPENDICULAR SPACED PARALLEL RIBS EXTENDING ALONG THE LENGTH OF AND INTEGRAL WITH A BOTTOM WALL, PROVIDING SAID EXTRUSION IN A LENGTH LONGER THAN THE DESIRED LENGTH OF THE TRAY, REMOVING MATERIAL AT THE ENDS OF THE RIBS SO THAT A RIBLESS PORTION OF THE BOTTOM WALL IS PROVIDED AT EACH END THEREOF IN A LENGTH SLIGHTLY GREATER THAN THE HEIGHT OF THE RIBS, AND BENDING SAID RIBLESS PORTIONS UPWARDLY SO THAT THEY ARE SUBSTANTIALLY PERPENDICULAR TO THE REMAINDER OF THE BOTTOM WALL AND ON THE SAME SIDE OF THE REMAINDER OF THE BOTTOM WALL AS THE RIBS.
Claim 2
Independent Claim
113 words
A METHOD OF MANUFACTURING A TRAY COMPRISING THE STEPS OF EXTRUDING MATERIAL TO FROM INTEGRAL SUBSTANTIALLY PERPENDICULAR SPACED PARALLEL RIBS EXTENDING ALONG THE LENGTH OF AND INTEGRAL WITH A BOTTOM WALL, PROVIDING SAID EXTRUSION IN A LENGTH LONGER THAN THE DESIRED LENGTH OF THE TRAY, REMOVING MATERIAL AT THE ENDS OF THE RIBS SO THAT A RIBLESS PORTION OF THE BOTTOM WALL IS PROVIDED AT EACH END THEREOF IN A LENGTH SLIGHTLY GREATER THAN THE HEIGHT OF THE RIBS, AND BENDING SAID RIBLESS PORTIONS UPWARDLY SO THAT THEY ARE SUBSTANTIALLY PERPENDICULAR TO THE REMAINDER OF THE BOTTOM WALL AND ON THE SAME SIDE OF THE REMAINDER OF THE BOTTOM WALL AS THE RIBS.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |