US3134255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet wear tester
Assignee: Dow Chemical Co
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Filing: 1961-05-25
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Granted: 1964-05-26
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Expires: 1981-05-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Kenneth R Oliver
- 👤 Theodore B Lefferdink
- 👤 Richard F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:48
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/56; G01N33/00; G01N33/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A WEAR TESTING DEVICE COMPRISING A TABLE FOR SUPPORTING A TEST SPECIMEN, MEANS FOR REPETIVELY ENGAGING A SPECIMEN AND FOR EXERTING A PROGRESSIVELY VARYING PRESSURE ON THE SPECIMEN FROM ZERO TO AN ADJUSTABLE PREDETERMINED MAXIMUM AND BACK TO ZERO DURING EACH ENGAGEMENT AND INITIALLY ENGAGING THE SPECIMEN AT AN ADJUSTABLE PREDETERMINED ACUTE ANGLE OF ATTACK AT ZERO PRESSURE AND PROGRESSIVELY VARYING THE ANGLE OF APPLICATION OF PRESSURE ON THE SPECIMEN FROM SAID INITIAL ACUTE ANGLE OF ATTACK PAST THE PERPENDICULAR TO THE SPECIMEN AT SUBSTANTIALLY SAID MAXIMUM PRESSURE TO AN ADJUSTABLE PREDETERMINED ACUTE ANGLE OF DEPARTURE THEREFROM AT ZERO PRESSURE AND RETURNING SAID MEANS RAISED OUT OF CONTACT WITH THE SPECIMEN TO THE INITIAL SPECIMEN ENGAGING POSITION, AND MEANS FOR HOLDING SAID SPECIMEN RELATIVELY FIXEDLY DURING ENGAGEMENT THEREOF BY SAID ENGAGING MEANS.
Claim 2
Dependent Claim
132 words
A WEAR TESTING DEVICE COMPRISING A TABLE FOR SUPPORTING A TEST SPECIMEN, MEANS FOR REPETIVELY ENGAGING A SPECIMEN AND FOR EXERTING A PROGRESSIVELY VARYING PRESSURE ON THE SPECIMEN FROM ZERO TO AN ADJUSTABLE PREDETERMINED MAXIMUM AND BACK TO ZERO DURING EACH ENGAGEMENT AND INITIALLY ENGAGING THE SPECIMEN AT AN ADJUSTABLE PREDETERMINED ACUTE ANGLE OF ATTACK AT ZERO PRESSURE AND PROGRESSIVELY VARYING THE ANGLE OF APPLICATION OF PRESSURE ON THE SPECIMEN FROM SAID INITIAL ACUTE ANGLE OF ATTACK PAST THE PERPENDICULAR TO THE SPECIMEN AT SUBSTANTIALLY SAID MAXIMUM PRESSURE TO AN ADJUSTABLE PREDETERMINED ACUTE ANGLE OF DEPARTURE THEREFROM AT ZERO PRESSURE AND RETURNING SAID MEANS RAISED OUT OF CONTACT WITH THE SPECIMEN TO THE INITIAL SPECIMEN ENGAGING POSITION, AND MEANS FOR HOLDING SAID SPECIMEN RELATIVELY FIXEDLY DURING ENGAGEMENT THEREOF BY SAID ENGAGING MEANS.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |