US3200898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Doosan Bobcat North America Inc
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Filing: 1963-07-29
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Granted: 1965-08-17
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Francis M Dobbertien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:44
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
155 words
AN AIR CASTER COMPRISING AN ANNULAR PLATE MEMBER, AN AIR NOZZLE CONNECTED TO SAID PLATE MEMBER CENTRALLY THEREOF, A SMOOTH MEMBRANE HAVING A FIRST RING-LIKE PORTION WITH INNER AND OUTER PERIPHERIES AND A SECOND RINGLIKE FLEXIBLE PORTION WITH AN OUTER PERIPHERY, THE OUTER PERIPHERY OF SAID FIRST PORTION BEING AFFIXED TO SAID PLATE MEMBER ADJACENT THE OUTER EDGE THEREOF AND THE INNER PERIPHERY OF SAID FIRST PORTION BEING AFFIXED TO SAID NOZZLE, THE OUTER PERIPHERY OF SAID SECOND PORTION BEING AFFIXED TO SAID PLATE MEMBER INTERMEDIATE THE OUTER EDGE THEREOF AND SAID NOZZLE SO THAT A FIRST CLOSED CHAMBER IS DEFINED BY SAID NOZZLE, PLATE MEMBER AND FIRST PORTION AND A SECOND CLOSED CHAMBER ADJACENT TO AND SEPARATE FROM SAID FIRST CHAMBER IS DEFINED BY SAID FIRST AND SECOND PORTIONS AND SAID PLATE MEMBER, VALVE MEANS FOR SUPPLYING SAID FIRST CHAMBER WITH PRESSURIZED AIR AND MEANS FOR SUBSTANTIALLY FILLING SAID SECOND CHAMBER WITH A LIQUID.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |