US3438761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacturing float glass with internal circulatory bath heat exchange
Assignee: AGC Glass Europe SA
•
Filing: 1966-10-20
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Granted: 1969-04-15
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Expires: 1986-10-20
Abstract
No abstract record available.
Inventors
- 👤 Pierre Eloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:54
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/20; C03B18/22; C03B18/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3231351A
Cited
US3317301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |