Patent US3251670A successfully refreshed from Google Patents.
US3251670A
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Differential thermal treatment of glass objects
Assignee: Compagnie de Saint Gobain SA
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Filing: 1962-08-24
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Granted: 1966-05-17
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Expires: 1982-08-24
Abstract
No abstract record available.
Inventors
- 👤 Acloque Paul Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:42
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/0413; A; A47; A47K; A47K11/00; A47K11/02; A47K11/023; C03B27/052; Y; Y02; Y02A; Y02A50/00; Y02A50/30; Y10; Y10T; Y10T428/00; Y10T428/31; Y10T428/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN THE METHOD OF THERMALLY TREATING A GLASS SHEET WHICH INCLUDES THE HEATING OF THE SHEET TO A TEMPERATURE SUFFICIENTLY HIGH TO EFFECT TEMPERING WHEN FOLLOWED BY A SUDDEN COOLING THEREOF, THE STEP OF DIFFERENTIALLY HEATTREATING LESS INTENSELY A SELECTED ZONE OF THE SHEET WITH RESPECT TO THE PORTION OF THE SHEET ADJACENT THERETO BY IMPOSING THE DIFFERENTIAL THERMAL TREATMENT AT SAID ZONE AT ONE SIDE ONLY OF SAID SHEET.
Claim 2
Dependent Claim
70 words
IN THE METHOD OF THERMALLY TREATING A GLASS SHEET WHICH INCLUDES THE HEATING OF THE SHEET TO A TEMPERATURE SUFFICIENTLY HIGH TO EFFECT TEMPERING WHEN FOLLOWED BY A SUDDEN COOLING THEREOF, THE STEP OF DIFFERENTIALLY HEATTREATING LESS INTENSELY A SELECTED ZONE OF THE SHEET WITH RESPECT TO THE PORTION OF THE SHEET ADJACENT THERETO BY IMPOSING THE DIFFERENTIAL THERMAL TREATMENT AT SAID ZONE AT ONE SIDE ONLY OF SAID SHEET.
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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |