US3794477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass sheet float apparatus with heat flux edge detector
Assignee: PPG Industries Inc
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Filing: 1972-06-09
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Granted: 1974-02-26
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Expires: 1992-06-09
Abstract
Abstract An apparatus for detecting the position of the edge of a body of hot glass floating on a pool of molten metal combines an elongated heat flux detector in a cooled enclosure and provides an output signal that is proportional to the amount of hot glass facing the detector. The device imposes no external forces upon the glass, does not contact the glass and may be held in a fixed position while providing a continuous signal despite glass movement.
Inventors
- 👤 A Farabaugh
- 👤 J Gulotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:25
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/02; G01B11/04; G01B11/046; C; C03; C03B; C03B18/00; C03B18/02; C03B18/04; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/341; G05; G05D; G05D5/00; G05D5/04; G05D5/06
Claims Analysis
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |