US2978336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preserving edible material
Assignee: Liquefreeze Co Inc
•
Filing: 1957-06-25
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Granted: 1961-04-04
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Expires: 1977-06-25
Abstract
No abstract record available.
Inventors
- 👤 Morrison Willard Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/105; A; A23; A23B; A23B2/00; A23B2/70; A23B2/704; A23B2/708; A23F; A23F5/00; A23F5/10; A23F5/105; B; B65; B65B; B65B25/00; B65B25/001; B65D; B65D81/00; B65D81/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2131181A
Cited
US2159835A
Cited
GB521715A
Cited
US2541441A
Cited
US2569217A
Cited
US2583697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |