US3255599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for freezing food and other perishables
Assignee: ELMWOOD PRODUCTS Inc
•
Filing: 1965-01-14
•
Granted: 1966-06-14
•
Expires: 1985-01-14
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:57
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/80; A23B2/85; A23B2/88; A23B2/803; F; F25; F25D; F25D3/00; F25D3/10; F25D3/102; F25D3/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A FREEZE DOWN APPARATUS, AN INSULATED FREEZING CHAMBER, MEANS FOR SUPPLYING LIQUID NITROGEN THERETO, MEANS FOR FEEDING RELATIVELY WARN MATERIAL THERETO FOR FREEZING EXPOSURE TO THE LIQUID NITROGEN, MEANS FOR WITHDRAWING THE GAS RESULTING FROM THE EXPOSURE OF THE MATERIAL TO THE LIQUID NITROGEN FROM THE FREEZING CHAMBER FOR RELIQUEFACTION, AN INSULATED STORAGE CHAMBER ADAPTED TO RECEIVE AT LEAST SOME OF THE MATERIAL FROZEN IN THE FREEZING CHAMBER, MEANS FOR SUPPLYING LIQUID NITROGEN TO THE STORAGE CHAMBER AND FOR WITHDRAWING THEREFROM THE RE-
Claim 2
Dependent Claim
84 words
IN A FREEZE DOWN APPARATUS, AN INSULATED FREEZING CHAMBER, MEANS FOR SUPPLYING LIQUID NITROGEN THERETO, MEANS FOR FEEDING RELATIVELY WARN MATERIAL THERETO FOR FREEZING EXPOSURE TO THE LIQUID NITROGEN, MEANS FOR WITHDRAWING THE GAS RESULTING FROM THE EXPOSURE OF THE MATERIAL TO THE LIQUID NITROGEN FROM THE FREEZING CHAMBER FOR RELIQUEFACTION, AN INSULATED STORAGE CHAMBER ADAPTED TO RECEIVE AT LEAST SOME OF THE MATERIAL FROZEN IN THE FREEZING CHAMBER, MEANS FOR SUPPLYING LIQUID NITROGEN TO THE STORAGE CHAMBER AND FOR WITHDRAWING THEREFROM THE RE-
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |