US3744985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling temperature of conveyed glass sheets
Assignee: PPG Industries Inc
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Filing: 1971-06-08
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Granted: 1973-07-10
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Expires: 1991-06-08
Abstract
Abstract A novel arrangement for controlling the thermal gradient of glass sheet undergoing thermal processing where temperature is a critical feature of the operation such as in shaping, coating, and he like.
Inventors
- 👤 J Peternel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:45
CPC Classifications
C; C03; C03B; C03B29/00; C03B29/04; C03B29/06; C03B29/08; C03B29/10; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1932; G05D23/1934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |