Patent US3241936A successfully refreshed from Google Patents.
US3241936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bending glass sheets
Assignee: Libbey Owens Ford Glass Co
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Filing: 1963-03-04
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Granted: 1966-03-22
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Herbert A Leflet
- 👤 Frank J Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:24
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03B23/0258; C03B23/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF BENDING GLASS SHEETS TO RELATIVELY SHARP ANGLES, WHICH COMPRISES FORMING A GROOVE IN A SURFACE OF A FLAT SHEET OF GLASS TO BE BENT, WHICH GROOVE EXTENDS CONTINUOUSLY ALONG A SUBSTANTIALLY STRAIGHT LINE FROM ONE EDGE OF THE SHEET TO THE OPPOSITE EDGE THEREOF, SUPPORTING THE FLAT SHEET ALONG ITS MARGINAL EDGE PORTIONS ONLY ABOVE A HORIZONTALLY DISPOSED SHAPING SURFACE OF A BENDING MOLD, HEATING THE SHEET TO BENDING TEMPERATURE, AND CAUSING THE SHEET TO SAG BY GRAVITY ALONG THE GROOVE INTO CONFORMITY WITH SAID SHAPING SURFACE OF THE MOLD.
Claim 2
Independent Claim
93 words
A METHOD OF BENDING GLASS SHEETS TO RELATIVELY SHARP ANGLES, WHICH COMPRISES FORMING A GROOVE IN A SURFACE OF A FLAT SHEET OF GLASS TO BE BENT, WHICH GROOVE EXTENDS CONTINUOUSLY ALONG A SUBSTANTIALLY STRAIGHT LINE FROM ONE EDGE OF THE SHEET TO THE OPPOSITE EDGE THEREOF, SUPPORTING THE FLAT SHEET ALONG ITS MARGINAL EDGE PORTIONS ONLY ABOVE A HORIZONTALLY DISPOSED SHAPING SURFACE OF A BENDING MOLD, HEATING THE SHEET TO BENDING TEMPERATURE, AND CAUSING THE SHEET TO SAG BY GRAVITY ALONG THE GROOVE INTO CONFORMITY WITH SAID SHAPING SURFACE OF THE MOLD.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |