US3201904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for finishing glass surfaces
Assignee: Corning Glass Works
•
Filing: 1961-11-09
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Granted: 1965-08-24
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Expires: 1981-11-09
Abstract
No abstract record available.
Inventors
- 👤 James W Evans
- 👤 Karl E Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:17
CPC Classifications
B; B24; B24D; B24D13/00; B24D13/14; B24D13/142; B24D13/18; Y; Y10; Y10S; Y10S451/00; Y10S451/921
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
IN A DISC FOR FINISHING A CONVEX SURFACE OF A GLASS ARTICLE, A RADIALLY AND PERIPHERALLY FLEXIBLE CONCAVE FINISHING UNIT COMPRISING A BACKING OF AT LEAST ONE LAYER OF CLOTH AND AT LEAST ONE LAYER OF RUBBER-LIKE MATERIAL, MEANS FOR RIGIDLY SUPPORTNG SAID BACKING AT ITS CENTRAL PORTION AND ABOUT ITS PERIPHERY, RESILIENT MEANS FOR CUSHIONING SAID BACKING INTERMEDIATE SAID CENTRAL PORTION AND SAID PERIPHERY, GLASS ARTICLE FINISHING ELEMENTS ATTACHED TO SAID BACKING, AND MEANS FOR FLOWING AN ABRASIVE SLURRY BETWEEN SAID BACKING AND THE SURFACE OF SAID ARTICLE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |