US3018611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timer device and method for determination
Assignee: —
•
Filing: —
•
Granted: 1962-01-30
•
Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:41
CPC Classifications
G; G01; G01K; G01K3/00; G01K3/02; G01K3/04; G01N; G01N31/00; G01N31/22; G01N31/229; G04; G04F; G04F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A TEMPERATURE INSENSITIVE DEVICE FOR MEASURING TIME INTERVALS COMPRISING AN OXYGEN-REACTIVE MATERIAL HAVING A SUBSTANTIALLY INSIGNIFICANT ACTIVATION ENERGY FOR COMBINATION WITH OXYGEN TO PRODUCE A REACTION PRODUCT VISUALLY CONTRASTABLE WITH UNREACTED MATERIAL, A TRANSPARENT HERMETICALLY SEALED CONTAINER FOR SAID OXYGEN-REACTIVE MATERIAL, MEANS FORMING A PART OF SAID CONTAINER AND DEFINING AN AIR INLET FOR SAID CONTAINER AND PROPORTIONED OF A SIZE PROVIDING INFLOW OF AIR AT A RATE INVERSELY TO TEMPERATURE, SAID OXYGEN-REACTIVE MATERIAL BEING COMBINABLE WITH INFLOWING AIR WHICH IS DIFFUSED WITHIN SAID CONTAINER AT A RATE PROPORTIONAL TO TEMPERATURE AND SUBSSTANTIALLY COUNTERBALANCING THE TEMPERATURE INDUCED VARIATION OF AIR INFLOW THROUGH SAID INLET, SAID OXYGEN-REACTIVE MATERIAL BEING THEREBY VISUALLY CONVERTED AS A FUNCTION OF TIME AND INSENSITIVELY TO TEMPERATURE, AND MEANS FOR REMOVABLY SEALING SAID AIR INLET PRIOR TO USAGE OF SAID DEVICE
Claim 2
Dependent Claim
134 words
A TEMPERATURE INSENSITIVE DEVICE FOR MEASURING TIME INTERVALS COMPRISING AN OXYGEN-REACTIVE MATERIAL HAVING A SUBSTANTIALLY INSIGNIFICANT ACTIVATION ENERGY FOR COMBINATION WITH OXYGEN TO PRODUCE A REACTION PRODUCT VISUALLY CONTRASTABLE WITH UNREACTED MATERIAL, A TRANSPARENT HERMETICALLY SEALED CONTAINER FOR SAID OXYGEN-REACTIVE MATERIAL, MEANS FORMING A PART OF SAID CONTAINER AND DEFINING AN AIR INLET FOR SAID CONTAINER AND PROPORTIONED OF A SIZE PROVIDING INFLOW OF AIR AT A RATE INVERSELY TO TEMPERATURE, SAID OXYGEN-REACTIVE MATERIAL BEING COMBINABLE WITH INFLOWING AIR WHICH IS DIFFUSED WITHIN SAID CONTAINER AT A RATE PROPORTIONAL TO TEMPERATURE AND SUBSSTANTIALLY COUNTERBALANCING THE TEMPERATURE INDUCED VARIATION OF AIR INFLOW THROUGH SAID INLET, SAID OXYGEN-REACTIVE MATERIAL BEING THEREBY VISUALLY CONVERTED AS A FUNCTION OF TIME AND INSENSITIVELY TO TEMPERATURE, AND MEANS FOR REMOVABLY SEALING SAID AIR INLET PRIOR TO USAGE OF SAID DEVICE
References Cited (Backward Citations)
US2337534A
Cited
US2785057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |