US2826073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sterilization indicator
Assignee: ASEPTIC THERMO INDICATOR COMPA
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Filing: 1956-02-20
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Granted: 1958-03-11
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Willard M Huyck
- 👤 Vincent A Romito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:58
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/24; Y; Y10; Y10S; Y10S116/00; Y10S116/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
AN INDICATOR INCLUDING A BASE HAVING THERON A FIRST THERMOSENSITIVE INDICATING MATERIAL CAPABLE OF CHANGING FROM ONE COLOR TO ANOTHER IN RESPONSE TO EXPOSURE TO A FIRST PREDETERMINED TEMPERATURE FOR FIRST PREDETERMINED INTERVAL OF TIME, AND HAVING THEREON AN INDICIUM INDICATING AN UNPROCESSED CONDITION, SAID FIRST THERMOSENSITIVE INDICATING MATERIAL AND SAID INDICIUM BEING IN REGISTER ON SAID BASE AND SAID INDICIUM BEING OF A COLOR WHICH IS VISIBLE RELATIVE TO SAID ONE COLOR OF SAID FIRST THERMOSETTING INDICATING MATERIAL AND WHICH IS SUBSTANTIALLY INVISIBLE RELATIVE TO SAID OTHER COLOR THEREOF, WHEREBY SAID INDICIUM IS RENDERED SUBSTANTIALLY INVISIBLE BY SAID EXPOSURE TO SAID FIRST PREDETERMINED TEMPERATURE FOR SAID FIRST PREDETERMINED INVTERVAL OF TIME, SAID BASE HAVING THEREON A SECOND THERMOSENSITIVE INDICATING MATERIAL ADJACENT SAID FIRST THERMOSENSITIVE INDICATING MATERIAL, SAID SECOND THERMOSETTING INDICTING MATERIAL BEING CAPABLE OF CHANGING COLOR IN RESPONSE TO EXPOSURE TO A SECOND PREDETERMINED TEMPERTURE FOR A SECOND PREDETERMINED INTERVAL OF TIME, ONE OF SAID SECOND PREDETERMINED TEMPERATURE AND SAID SECOND PREDETERMINED INTERVAL OF TIME BEING LOWER THAN THE CORRESPONDING ONE OF SAID FIRST PREDETERMINED TEMPERTURE AND SAID FIRST PREDETERMINED INTERVAL OF TIME SO THAT SECOND THERMOSENSITIVE INDICATING MATERIAL CHANGES COLOR BEFORE SAID FIRST THERMO SENSITIVE INDICATING MATERIAL DOES.
Claim 2
Dependent Claim
200 words
AN INDICATOR INCLUDING A BASE HAVING THERON A FIRST THERMOSENSITIVE INDICATING MATERIAL CAPABLE OF CHANGING FROM ONE COLOR TO ANOTHER IN RESPONSE TO EXPOSURE TO A FIRST PREDETERMINED TEMPERATURE FOR FIRST PREDETERMINED INTERVAL OF TIME, AND HAVING THEREON AN INDICIUM INDICATING AN UNPROCESSED CONDITION, SAID FIRST THERMOSENSITIVE INDICATING MATERIAL AND SAID INDICIUM BEING IN REGISTER ON SAID BASE AND SAID INDICIUM BEING OF A COLOR WHICH IS VISIBLE RELATIVE TO SAID ONE COLOR OF SAID FIRST THERMOSETTING INDICATING MATERIAL AND WHICH IS SUBSTANTIALLY INVISIBLE RELATIVE TO SAID OTHER COLOR THEREOF, WHEREBY SAID INDICIUM IS RENDERED SUBSTANTIALLY INVISIBLE BY SAID EXPOSURE TO SAID FIRST PREDETERMINED TEMPERATURE FOR SAID FIRST PREDETERMINED INVTERVAL OF TIME, SAID BASE HAVING THEREON A SECOND THERMOSENSITIVE INDICATING MATERIAL ADJACENT SAID FIRST THERMOSENSITIVE INDICATING MATERIAL, SAID SECOND THERMOSETTING INDICTING MATERIAL BEING CAPABLE OF CHANGING COLOR IN RESPONSE TO EXPOSURE TO A SECOND PREDETERMINED TEMPERTURE FOR A SECOND PREDETERMINED INTERVAL OF TIME, ONE OF SAID SECOND PREDETERMINED TEMPERATURE AND SAID SECOND PREDETERMINED INTERVAL OF TIME BEING LOWER THAN THE CORRESPONDING ONE OF SAID FIRST PREDETERMINED TEMPERTURE AND SAID FIRST PREDETERMINED INTERVAL OF TIME SO THAT SECOND THERMOSENSITIVE INDICATING MATERIAL CHANGES COLOR BEFORE SAID FIRST THERMO SENSITIVE INDICATING MATERIAL DOES.
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) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |