Patent US3225463A successfully refreshed from Google Patents.
US3225463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air ventilated insole
Assignee: Individual
•
Filing: 1962-10-12
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Granted: 1965-12-28
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Expires: 1982-10-12
Abstract
No abstract record available.
Inventors
- 👤 Charles E Burnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:26
CPC Classifications
A; A43; A43B; A43B7/00; A43B7/06; A43B7/08; A43B7/081; A43B17/00; A43B17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A SHOE, INSOLE VENTILATING MEANS COMPRISING: AN INSOLE, MEANS PROVIDING A PUMP IN SAID INSOLE HAVING A CORDATE CONFIGURATION IN PLAN VIEW AND SIDE ELEVATION WITH A SHARPLY CURVED BASE AND AN APEX WHOSE INWARDLY CURVING WALLS DEFINE SLITS WHICH FORM AN INLET AND EXHAUST VALVES, RESPECTIVELY, FOR A COMPRESSIBLE AND EXPANDABLE CHAMBER IN SAID PUMP, SAID SHARPLY CURVED BASE BEING POSITIONED IN THE HEEL PORTION OF SAID INSOLE FOR ALTERNATE COMPRESSION AND EXPANSION BY THE HEEL OF THE WEARER OF THE SHOE WHILE WALKING; AND MEANS PROVIDING A PASSAGEWAY IN SAID INSOLE FLUIDLY CONNECTED AT ONE END OF SAID EXHAUST VALVE AND TERMINATING AT THE OTHER END IN VENTS LOCATED IN THE UPPER SURFACE OF THE TOE PORTION OF SAID INSOLE.
Claim 2
Dependent Claim
123 words
IN A SHOE, INSOLE VENTILATING MEANS COMPRISING: AN INSOLE, MEANS PROVIDING A PUMP IN SAID INSOLE HAVING A CORDATE CONFIGURATION IN PLAN VIEW AND SIDE ELEVATION WITH A SHARPLY CURVED BASE AND AN APEX WHOSE INWARDLY CURVING WALLS DEFINE SLITS WHICH FORM AN INLET AND EXHAUST VALVES, RESPECTIVELY, FOR A COMPRESSIBLE AND EXPANDABLE CHAMBER IN SAID PUMP, SAID SHARPLY CURVED BASE BEING POSITIONED IN THE HEEL PORTION OF SAID INSOLE FOR ALTERNATE COMPRESSION AND EXPANSION BY THE HEEL OF THE WEARER OF THE SHOE WHILE WALKING; AND MEANS PROVIDING A PASSAGEWAY IN SAID INSOLE FLUIDLY CONNECTED AT ONE END OF SAID EXHAUST VALVE AND TERMINATING AT THE OTHER END IN VENTS LOCATED IN THE UPPER SURFACE OF THE TOE PORTION OF SAID INSOLE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |