Patent US4287477A successfully refreshed from Google Patents.
Patent US3343775A successfully refreshed from Google Patents.
US3343775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid cushion
Assignee: Individual
•
Filing: 1966-05-06
•
Granted: 1967-09-26
•
Expires: 1986-05-06
Abstract
No abstract record available.
Inventors
- 👤 William H Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:15
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/50; B60N2/52; B60N2/525; B60N2/501; B60N2/502
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A FLUID CUSHION COMPRISING SPACED FIRST AND SECOND PISTON MEMBERS, MEANS CONNECTING SAID PISTON MEMBERS SO THAT THE DISTANCE THEREBETWEEN IS SUBSTANTIALLY CONSTANT, SAID PISTON MEMBERS MOUNTED FOR RECIPROCATION ALONG AN AXIS WHICH IS SUBSTANTIALLY TRANSVERSE TO THE PISTON MEMBERS, THE FIRST PISTON MEMBER HAVING AN AREA TRANSVERSE TO SAID AXIS WHICH IS LARGER THAN THE CORRESPONDING AREA OF SAID SECOND PISTON MEMBER, AN ENCLOSED FLUID CHAMBER HOUSING, SAID FLUID CHAMBER HOUSING HAVING SPACED PORTIONS, FLUID-TIGHT FLEXIBLE MEANS CONNECTING SAID FIRST PISTON MEMBER TO ONE PORTION OF SAID FLUID CHAMBER HOUSING AND OTHER FLUID-TIGHT FLEXIBLE MEANS CONNECTING SAID SECOND PISTON MEMBER OF THE OTHER PORTION OF SAID FLUID CHAMBER HOUSING, WHEREBY SAID PISTON MEMBERS AND SAID HOUSING FORM A FLUID ENCLOSURE.
Claim 2
Dependent Claim
121 words
A FLUID CUSHION COMPRISING SPACED FIRST AND SECOND PISTON MEMBERS, MEANS CONNECTING SAID PISTON MEMBERS SO THAT THE DISTANCE THEREBETWEEN IS SUBSTANTIALLY CONSTANT, SAID PISTON MEMBERS MOUNTED FOR RECIPROCATION ALONG AN AXIS WHICH IS SUBSTANTIALLY TRANSVERSE TO THE PISTON MEMBERS, THE FIRST PISTON MEMBER HAVING AN AREA TRANSVERSE TO SAID AXIS WHICH IS LARGER THAN THE CORRESPONDING AREA OF SAID SECOND PISTON MEMBER, AN ENCLOSED FLUID CHAMBER HOUSING, SAID FLUID CHAMBER HOUSING HAVING SPACED PORTIONS, FLUID-TIGHT FLEXIBLE MEANS CONNECTING SAID FIRST PISTON MEMBER TO ONE PORTION OF SAID FLUID CHAMBER HOUSING AND OTHER FLUID-TIGHT FLEXIBLE MEANS CONNECTING SAID SECOND PISTON MEMBER OF THE OTHER PORTION OF SAID FLUID CHAMBER HOUSING, WHEREBY SAID PISTON MEMBERS AND SAID HOUSING FORM A FLUID ENCLOSURE.
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |