Patent US6621084B1 successfully refreshed from Google Patents.
US2698804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preserving lettuce
Assignee: Individual
•
Filing: 1951-04-13
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Granted: 1955-01-04
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Expires: 1971-04-13
Abstract
No abstract record available.
Inventors
- 👤 Samuel L Crisafulli
- 👤 Crisafulli Carmelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:30
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/04; A23B7/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE PROCESS OF TREATING LETTUCE WHICH COMPRISES IMMERSING THE LETTUCE IN COLD DISTILLED WATER CONTAINING A TREATMENT AGENT SELECTED FROM THE GROUP WHICH CONSISTS OF POTASSIUM NITRATE AND SODIUM BENZOATE SAID SOLUTION BEING AT A TEMPERATURE WITHIN THE RANGE OF SOLUTION FREEZING POINT TO 40 DEGREES F.
Claim 2
Dependent Claim
47 words
THE PROCESS OF TREATING LETTUCE WHICH COMPRISES IMMERSING THE LETTUCE IN COLD DISTILLED WATER CONTAINING A TREATMENT AGENT SELECTED FROM THE GROUP WHICH CONSISTS OF POTASSIUM NITRATE AND SODIUM BENZOATE SAID SOLUTION BEING AT A TEMPERATURE WITHIN THE RANGE OF SOLUTION FREEZING POINT TO 40 DEGREES F.
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) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |