Patent US3303589A successfully refreshed from Google Patents.
US3333371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-foamed polyurethane sander pad for abrasive discs
Assignee: CA ACQUISITION Co CHICAGO ILL A CORP OF
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Filing: 1966-04-29
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Granted: 1967-08-01
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Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 Eric W Pratt
- 👤 Harold A Hickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:59
CPC Classifications
B; B24; B24D; B24D9/00; B24D9/08; B29; B29C; B29C45/00; B29C45/14; B29C45/14336; B29C45/1459; B29L; B29L2031/00; B29L2031/736
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A UNITARY, ABRASION-RESISTANT SANDER PAD ADAPTED FOR USE ON A ROTATIVELY DRIVEN SHAFT, SAID SANDER PAD CONSISTING ESSENTIALLY OF A SOLID DISC MOLDED AROUND A CENTRAL HUB MEMBER THEREBY PROVIDING A UNITARY PAD, SAID DISC BEING OF SUBSTANTIAL THICKNESS AND HAVING A FRONT FACE ADAPTED FOR MOUNTING S HEEET OF ABRASIVE MATERIAL, AND A REAR FACE, SAID DISC BEING DISPOSED SUBSTANTIALLY TRANSVERSELY OF THE AXIS OF ROTATION OF SAID PAD AND BEING FORMED FROM A NONFOAMED POLYURETHANE ELASTOMER HAVING A HARDNESS OF ABOUT 70 TO ABOUT 90 ON THE SHORE A SCALE THEREBY PROVIDING A DISC HAVING THE COMBINED CHARACTERISTICS OF FLEXIBILITY AND RESISTANCE TO ABRASION, SAID NON-FOAMED POLYURETHANE ELASTOMER CONSISTING ESSENTIALLY OF A URETHANE PREPOLYMER AND A CROSS-LINKING AGENT, SAID HUB MEMBER PROJECTING AXIALLY FROM THE REAR FACE OF SAID DISC FOR EFFECTING ATTACHMENT OF SAID PAD TO SAID SHAFT.
Claim 2
Dependent Claim
141 words
A UNITARY, ABRASION-RESISTANT SANDER PAD ADAPTED FOR USE ON A ROTATIVELY DRIVEN SHAFT, SAID SANDER PAD CONSISTING ESSENTIALLY OF A SOLID DISC MOLDED AROUND A CENTRAL HUB MEMBER THEREBY PROVIDING A UNITARY PAD, SAID DISC BEING OF SUBSTANTIAL THICKNESS AND HAVING A FRONT FACE ADAPTED FOR MOUNTING S HEEET OF ABRASIVE MATERIAL, AND A REAR FACE, SAID DISC BEING DISPOSED SUBSTANTIALLY TRANSVERSELY OF THE AXIS OF ROTATION OF SAID PAD AND BEING FORMED FROM A NONFOAMED POLYURETHANE ELASTOMER HAVING A HARDNESS OF ABOUT 70 TO ABOUT 90 ON THE SHORE A SCALE THEREBY PROVIDING A DISC HAVING THE COMBINED CHARACTERISTICS OF FLEXIBILITY AND RESISTANCE TO ABRASION, SAID NON-FOAMED POLYURETHANE ELASTOMER CONSISTING ESSENTIALLY OF A URETHANE PREPOLYMER AND A CROSS-LINKING AGENT, SAID HUB MEMBER PROJECTING AXIALLY FROM THE REAR FACE OF SAID DISC FOR EFFECTING ATTACHMENT OF SAID PAD TO SAID SHAFT.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |