US2709647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shellac-bonded abrasive articles and methods of manufacturing the same
Assignee: Unifrax I LLC
•
Filing: 1951-08-04
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Granted: 1955-05-31
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Expires: 1971-08-04
Abstract
No abstract record available.
Inventors
- 👤 George J Goepfert
- 👤 William A Spilsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:54
CPC Classifications
C; C09; C09G; C09G1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A BONDED ABRASIVE ARTICLE SUCH AS A GRINDING WHEEL OR A SHARPENING STONE COMPRISING A MASS OF ABRASIVE GRAINS BONDED WITH A BOND COMPRISING THE HEAT-HARDENED REACTION PRODUCT OF A MIXTURE COMPRISING ESSENTIALLLY SHELLAC AND MELAMINE IN THE PROPORTIONS OF ABOUT 1.5-12 PARTS MELAMINE TO ABOUT 98.5-88 PARTS SHELLAC.
Claim 2
Dependent Claim
49 words
A BONDED ABRASIVE ARTICLE SUCH AS A GRINDING WHEEL OR A SHARPENING STONE COMPRISING A MASS OF ABRASIVE GRAINS BONDED WITH A BOND COMPRISING THE HEAT-HARDENED REACTION PRODUCT OF A MIXTURE COMPRISING ESSENTIALLLY SHELLAC AND MELAMINE IN THE PROPORTIONS OF ABOUT 1.5-12 PARTS MELAMINE TO ABOUT 98.5-88 PARTS SHELLAC.
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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |