US2497469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible abrasive articles
Assignee: Unifrax I LLC
•
Filing: 1943-05-19
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Granted: 1950-02-14
•
Expires: 1963-05-19
Abstract
No abstract record available.
Inventors
- 👤 Norman P Robie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:44
CPC Classifications
C; C09; C09G; C09G1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A BONDED HEAT-RESISTANT ABRASIVE ARTICLE OF THE COATED ABRASIVE TYPE COMPRISING ABRASIVE PARTICLES BONDED TO A FLEXIBLE BACKING BY A BINDER COMPRISING A UNIFORM MIXTURE OF CASEIN AND A SODIUM SILICATE CEMENT.
Claim 2
Dependent Claim
32 words
A BONDED HEAT-RESISTANT ABRASIVE ARTICLE OF THE COATED ABRASIVE TYPE COMPRISING ABRASIVE PARTICLES BONDED TO A FLEXIBLE BACKING BY A BINDER COMPRISING A UNIFORM MIXTURE OF CASEIN AND A SODIUM SILICATE CEMENT.
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |