US3572283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire pressure indicator
Assignee: Schrader Automotive Inc
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Filing: 1969-07-15
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Granted: 1971-03-23
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Expires: 1989-07-15
Abstract
Abstract A CAP TYPE TIRE PRESSURE INDICATOR COMPRISES A VALVING PISTON WHICH WHEN PUSHED UP BY AIR PRESSURE PERMITS AIR PRESSURE TO COMMUNICATE TO A SECOND CHAMBER WHEREIN THE AIR PRESSURE HOLDS UP AN INDICATING PISTON. WHEN THE TIRE PRESSURE DROPS, THE VALVING PISTON LOWERS TO VALVE OFF PASSAGE TO THE SECOND CHAMBER PERMITTING THE INDICATING PISTON TO DROP TO A VISIBLE POSITION TO INDICATE INADEQUATE PRESSURE IN THE TIRE.
Inventors
- 👤 Robert B Ashman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:21
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0491; B60C23/0496; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3662
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |