US3251431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Labyrinth air caster and method of manufacture thereof
Assignee: Motors Liquidation Co
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Filing: 1962-05-21
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Granted: 1966-05-17
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Expires: 1982-05-21
Abstract
No abstract record available.
Inventors
- 👤 Harry A Mackie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:51
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/025; A; A47; A47B; A47B91/00; A47B91/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A LOW PRESSURE AIR ENERGIZED CASTER COMPRISING, A TWO LAYER LAMINATE OF FLEXIBLE NON-POROUS MATERIAL BONDED TOGETHER, THE UPPER LAYER BEING SUBSTANTIALLY FLAT AND THE LOWER LAYER BEING PERFORMED WITH A PLURALITY OF DISCRETELY ARRANGED DOWNWARDLY BULGED COMMUNICATING ANNULAR CAVITIES, MEANS FORMED IN THE LOWER LAYER VENTING EACH OF SAID CAVITIES TO ATMOSPHERE RADIALLY INBOARD OF THE LOWERMOST BULGED EXTREMITY OF EACH ANNULAR CAVITY, AND CONDUIT MEANS ATTACHED TO SAID LAMINATE FOR CONNECTING SAID CAVITIES IN COMMUNICATING RELATION WITH A SOURCE OF LOW PRESSURE AIR.
Claim 2
Dependent Claim
85 words
A LOW PRESSURE AIR ENERGIZED CASTER COMPRISING, A TWO LAYER LAMINATE OF FLEXIBLE NON-POROUS MATERIAL BONDED TOGETHER, THE UPPER LAYER BEING SUBSTANTIALLY FLAT AND THE LOWER LAYER BEING PERFORMED WITH A PLURALITY OF DISCRETELY ARRANGED DOWNWARDLY BULGED COMMUNICATING ANNULAR CAVITIES, MEANS FORMED IN THE LOWER LAYER VENTING EACH OF SAID CAVITIES TO ATMOSPHERE RADIALLY INBOARD OF THE LOWERMOST BULGED EXTREMITY OF EACH ANNULAR CAVITY, AND CONDUIT MEANS ATTACHED TO SAID LAMINATE FOR CONNECTING SAID CAVITIES IN COMMUNICATING RELATION WITH A SOURCE OF LOW PRESSURE AIR.
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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |