Patent US3262768A successfully refreshed from Google Patents.
US3262768A
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Method for bending and tempering glass sheets
Assignee: Libbey Owens Ford Glass Co
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Filing: 1961-01-24
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Granted: 1966-07-26
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Expires: 1981-01-24
Abstract
No abstract record available.
Inventors
- 👤 Frank J Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:33
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03B23/0252; C03B27/00; C03B27/04; C03B27/044; C03B27/0442
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A METHOD OF BENDING AND TEMPERING GLASS SHEETS, THE STEPS OF, SUPPORTING A SHEET TO BE BENT ON A SHAPING SURFACE CORRESPONDING IN OUTLINE AND CURVATURE TO THE SHEET WHEN BENT, HEATING THE SHEET TO A TEMPERATURE CORRESPONDING TO THE SOFTENING POINT OF THE GLASS UNTIL SAID SHEET SAGS INTO ENGAGEMENT WITH SAID SHAPING SURFACE, AND RAPIDLY REDUCING THE TEMPERATURE OF THE OPPOSITE SURFACES OF THE SHEET AT DIFFERENT RATES THEREBY MAINTAINING THE UPPERMOST SURFACE AT A LOWER TEMPERATURE THAN THE LOWER MOST SURFACE TO CAUSE WARPING OF THE SHEET TO MOVE AT LEAST ONE EDGE OF SAID SHEET aWAY FROM AND OUT OF CONTACT WITH SAID SHAPING SURFACE UNTIL SAID SHEET IS FULLY TEMPERED.
Claim 2
Dependent Claim
116 words
IN A METHOD OF BENDING AND TEMPERING GLASS SHEETS, THE STEPS OF, SUPPORTING A SHEET TO BE BENT ON A SHAPING SURFACE CORRESPONDING IN OUTLINE AND CURVATURE TO THE SHEET WHEN BENT, HEATING THE SHEET TO A TEMPERATURE CORRESPONDING TO THE SOFTENING POINT OF THE GLASS UNTIL SAID SHEET SAGS INTO ENGAGEMENT WITH SAID SHAPING SURFACE, AND RAPIDLY REDUCING THE TEMPERATURE OF THE OPPOSITE SURFACES OF THE SHEET AT DIFFERENT RATES THEREBY MAINTAINING THE UPPERMOST SURFACE AT A LOWER TEMPERATURE THAN THE LOWER MOST SURFACE TO CAUSE WARPING OF THE SHEET TO MOVE AT LEAST ONE EDGE OF SAID SHEET aWAY FROM AND OUT OF CONTACT WITH SAID SHAPING SURFACE UNTIL SAID SHEET IS FULLY TEMPERED.
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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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |