US2540112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive wheel
Assignee: Unifrax I LLC
•
Filing: 1949-12-29
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Granted: 1951-02-06
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Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 George J Goepfert
- 👤 Louis L Cofran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/02; B24D5/04; B24D5/12; B24D7/00; B24D7/02; B24D7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AN ABRASIVE WHEEL COMPRISING A PLURALITY OF THIN FELTED, ABRASIVE-CONTAINING LAYERS OF FIBROUS MATERIAL COMPRESSED AND ADHESIVELY UNITED, SAID WHEEL HAVING EMBEDDED THEREIN AT LEAST TWO LAYERS OF RESIN-IMPREGNATED WOVEN FABRIC SUBSTANTIALLY COEXTENSIVE IN AREA WITH THE FLAT SIDE AREA OF SAID WHEEL.
Claim 2
Dependent Claim
43 words
AN ABRASIVE WHEEL COMPRISING A PLURALITY OF THIN FELTED, ABRASIVE-CONTAINING LAYERS OF FIBROUS MATERIAL COMPRESSED AND ADHESIVELY UNITED, SAID WHEEL HAVING EMBEDDED THEREIN AT LEAST TWO LAYERS OF RESIN-IMPREGNATED WOVEN FABRIC SUBSTANTIALLY COEXTENSIVE IN AREA WITH THE FLAT SIDE AREA OF SAID WHEEL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |