US2763557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Block freezing
Assignee: Protan AS
•
Filing: 1952-12-06
•
Granted: 1956-09-18
•
Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
- 👤 Helgerud Oyvind
- 👤 Olsen Alf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:31
CPC Classifications
A; A23; A23B; A23B4/00; A23B4/06; A23B4/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A METHOD FOR THE PRESERVATION OF FOOD STUFFS BY BLOCK FREEZING THE STEPS COMPRISING PLACING THE UNFROZEN FOODSTUFF IN AN AQUEOUS FLUID SOLUTION OF AN ALGINATE AND A CALCIUM SALT WHICH WILL GELATINIZE WITHIN FROM FIVE TO THIRTY MINUTES WHEREBY THERE IS FORMED A SOLID BLOCK COMPOSED OF SAID FOOD STUFF AND THE-FORMED GEL, AND SUBSEQUENTLY DEEP FREEZING SAID SOLID BLOCK.
Claim 2
Dependent Claim
62 words
IN A METHOD FOR THE PRESERVATION OF FOOD STUFFS BY BLOCK FREEZING THE STEPS COMPRISING PLACING THE UNFROZEN FOODSTUFF IN AN AQUEOUS FLUID SOLUTION OF AN ALGINATE AND A CALCIUM SALT WHICH WILL GELATINIZE WITHIN FROM FIVE TO THIRTY MINUTES WHEREBY THERE IS FORMED A SOLID BLOCK COMPOSED OF SAID FOOD STUFF AND THE-FORMED GEL, AND SUBSEQUENTLY DEEP FREEZING SAID SOLID BLOCK.
References Cited (Backward Citations)
US2191352A
Cited
US2329472A
Cited
US2420308A
Cited
US2441729A
Cited
US2536708A
Cited
US2517595A
Cited
FR983509A
Cited
US2611708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |