US3193367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass forming and shearing
Assignee: Corning Glass Works
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Filing: 1961-09-25
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Granted: 1965-07-06
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 James W Giffen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/035; C03B23/0352; C03B23/0355; C03B21/00; C03B21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN IMPROVED METHOD OF SHEARING A SHEET OF MOLTEN GLASS WHICH RETARDS THE FORMATION OF EDGE FISURES BY MINIMIZING THE HEAT EXTRACTED FROM THE SHEET ADJACENT THE SHEAR LINE PRIOR TO SHEARING COMPRISING, SUPPORTING A SHEET OF MOLTEN GLASS TO BE SHEAR-TRIMMED UPON THE UPPER EDGE OF A DIE, SUSPENDING A BORDER PORTION OF SUCH SHEET IN THE AMBIENT ATMOSPHERE ADJACENT A TRIMMING EDGE OF SUCH DIE TO INHIBIT HEAT EXTRACTION THEREFROM BY THE DIE, AND SHEAR-TRIMING THE SHEET ALONG THE TRIMMING EDGE WHILE PERMITTING THE RESIDUAL HEAT FROM THE BORDER PORTION TO RE-FUSE ANY MINOR FISSURES WHICH MAY HAVE RESULTED FROM THE TRIMMING OPERATION.
Claim 2
Dependent Claim
105 words
AN IMPROVED METHOD OF SHEARING A SHEET OF MOLTEN GLASS WHICH RETARDS THE FORMATION OF EDGE FISURES BY MINIMIZING THE HEAT EXTRACTED FROM THE SHEET ADJACENT THE SHEAR LINE PRIOR TO SHEARING COMPRISING, SUPPORTING A SHEET OF MOLTEN GLASS TO BE SHEAR-TRIMMED UPON THE UPPER EDGE OF A DIE, SUSPENDING A BORDER PORTION OF SUCH SHEET IN THE AMBIENT ATMOSPHERE ADJACENT A TRIMMING EDGE OF SUCH DIE TO INHIBIT HEAT EXTRACTION THEREFROM BY THE DIE, AND SHEAR-TRIMING THE SHEET ALONG THE TRIMMING EDGE WHILE PERMITTING THE RESIDUAL HEAT FROM THE BORDER PORTION TO RE-FUSE ANY MINOR FISSURES WHICH MAY HAVE RESULTED FROM THE TRIMMING OPERATION.
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |