US3231255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction devices including shock absorbing dampers and the like
Assignee: Dike-O-Seal Inc
•
Filing: 1963-10-02
•
Granted: 1966-01-25
•
Expires: 1983-10-02
Abstract
No abstract record available.
Inventors
- 👤 Richard L Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/30; F16F9/303; F16F9/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A DAMPER INCLUDING MEANS DEFINING A CHAMBER AND HAVING OPPOSED AREAS WHICH ARE RELATIVELY MOVABLE TOWARD ONE ANOTHER WITH SHOCK MOTION, A DAMPING LIQUID IN THE CHAMBER BETWEEN SAID OPPOSED AREAS, AT LEAST ONE OF SAID AREAS HAVING A RECESS THEREIN FILLED WITH A BULK COMPRESSIBLE FRICTION-GENERATING MASS OF CLOSED CELL RESILIENT MATERIAL, SAID MASS HAVING A PORTION PROJECTING TOWARD THE OPPOSING SURFACE AREA OF SUCH PORTION HAVING A CROWN AND SIDES EXPOSED TO AND COMPRESSIBLE ENGAGED BY THE LIQUID.
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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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |