US3067015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spoilage indicator for food containers
Assignee: Individual
•
Filing: 1960-01-29
•
Granted: 1962-12-04
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Expires: 1980-01-29
Abstract
No abstract record available.
Inventors
- 👤 Ray F Lawdermilt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; B; B65; B65D; B65D79/00; B65D79/02; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N21/783
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE COMBNATION WITH A WALLED FOOD CONTAINER OF A APOILAGE INDICATOR INCLUDING A TRANSPAENT WINDOW MOUNTED IN A WALL OF SAID CONTAINER, AN INDICATOR ELEMENT POSITIONED IN SAID CONTAINER BEHIND SAID WINDOW, A DIFFUSION SHEET BEHIND SAID INDICATOR ELEMENT, SAID DIFFUSION SHEET BEING UNIDIRECTIONALLY PERMEABLE TO GASES BUT IMPERMEABLE TO LIQUIDS AND SOLIDS, SAID DIFFUSION SHEET FURTHER BEING ATTACHED TO SAID WINDOW ALONG ITS MARGINAL EDGES, WHEREBY SAID INDICATOR ELEMENT IS SELECTED BETWEEN SAID SHEET AND SAID WINDOW, SAID INDICATOR ELEMENT INCLUDING A COLOR
Claim 2
Dependent Claim
84 words
THE COMBNATION WITH A WALLED FOOD CONTAINER OF A APOILAGE INDICATOR INCLUDING A TRANSPAENT WINDOW MOUNTED IN A WALL OF SAID CONTAINER, AN INDICATOR ELEMENT POSITIONED IN SAID CONTAINER BEHIND SAID WINDOW, A DIFFUSION SHEET BEHIND SAID INDICATOR ELEMENT, SAID DIFFUSION SHEET BEING UNIDIRECTIONALLY PERMEABLE TO GASES BUT IMPERMEABLE TO LIQUIDS AND SOLIDS, SAID DIFFUSION SHEET FURTHER BEING ATTACHED TO SAID WINDOW ALONG ITS MARGINAL EDGES, WHEREBY SAID INDICATOR ELEMENT IS SELECTED BETWEEN SAID SHEET AND SAID WINDOW, SAID INDICATOR ELEMENT INCLUDING A COLOR
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |