US3342573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treating glass sheets on a gaseous support bed
Assignee: PPG Industries Inc
•
Filing: 1965-12-13
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Granted: 1967-09-19
•
Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 James C Fredley
- 👤 George E Sleighter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:59
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/0404; C03B23/00; C03B23/02; C03B23/023; C03B23/035; C03B27/008; C03B27/0413; C03B27/044; C03B27/048; C03B29/00; C03B29/04; C03B29/06; C03B29/08; C03B29/12; C03B35/00; C03B35/14; C03B35/16; C03B35/18; C03B35/189; C03B35/22; C03B35/24; C03B35/243; C03C; C03C17/00; C03C17/001; C03C17/002; C03B2225/00; C03B2225/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3223501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |