Patent US2990807A successfully refreshed from Google Patents.
Patent US1909829A successfully refreshed from Google Patents.
Patent US3144738A successfully refreshed from Google Patents.
US3144738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrading apparatus
Assignee: Merit Products Inc
•
Filing: 1961-03-06
•
Granted: 1964-08-18
•
Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 Block Aleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:31
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN COMBINATION FOR PROVIDING AN ABRADING ACTION, A PLURALITY OF FLAPS EACH HAVING AN ABRASIVE MATERIAL ON AT LEAST ONE FACE OF THE FLAP, EACH OF THE FLAPS HAVING A PARTICULAR EDGE DEFINING ONE EXTREMITY OF THE FLAPS, FIRST MEANS DISPOSED IN COOPERATIVE RELATIONSHIP WITH THE FLAPS FOR RETAINING THE FLAPS IN AN ANNULARLY STACKED RELATIONSHIP DEFINING A HOLLOW CENTER, THERE BEING AN INTERNALLY DISPOSED GROOVE IN THE FIRST MEANS, MEANS MADE FROM AN ELASTICALLY EXPANSIBLE MATERIAL FOR EXPANSION INTO THE GROOVE IN THE FIRST MEANS AND DISPOSED WITHIN THE HOLLOW CENTER DEFINED BY THE FIRST MEANS FOR HOLDING THE FIRST MEANS AND THE FLAPS FOR ROTATION WITHOUT EXTENDING BEYOND THE PARTICULAR EDGES OF THE FLAPS, AND MEANS DISPOSED IN COOPERATIVE RELATIONSHIP WITH THE ELASTICALLY EXPANSIBLE MEANS FOR ADJUSTABLY CONTROLLING THE EXPANSION OF THE EXPANSIBLE MEANS INTO THE GROOVE IN THE FIRST MEANS.
Claim 2
Dependent Claim
143 words
IN COMBINATION FOR PROVIDING AN ABRADING ACTION, A PLURALITY OF FLAPS EACH HAVING AN ABRASIVE MATERIAL ON AT LEAST ONE FACE OF THE FLAP, EACH OF THE FLAPS HAVING A PARTICULAR EDGE DEFINING ONE EXTREMITY OF THE FLAPS, FIRST MEANS DISPOSED IN COOPERATIVE RELATIONSHIP WITH THE FLAPS FOR RETAINING THE FLAPS IN AN ANNULARLY STACKED RELATIONSHIP DEFINING A HOLLOW CENTER, THERE BEING AN INTERNALLY DISPOSED GROOVE IN THE FIRST MEANS, MEANS MADE FROM AN ELASTICALLY EXPANSIBLE MATERIAL FOR EXPANSION INTO THE GROOVE IN THE FIRST MEANS AND DISPOSED WITHIN THE HOLLOW CENTER DEFINED BY THE FIRST MEANS FOR HOLDING THE FIRST MEANS AND THE FLAPS FOR ROTATION WITHOUT EXTENDING BEYOND THE PARTICULAR EDGES OF THE FLAPS, AND MEANS DISPOSED IN COOPERATIVE RELATIONSHIP WITH THE ELASTICALLY EXPANSIBLE MEANS FOR ADJUSTABLY CONTROLLING THE EXPANSION OF THE EXPANSIBLE MEANS INTO THE GROOVE IN THE FIRST 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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |