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US3420647A
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US
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Method of and apparatus for the manufacture of flat glass on a molten metal bath
Assignee: Pilkington Group Ltd
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Filing: 1967-08-30
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Granted: 1969-01-07
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Expires: 1987-08-30
Abstract
No abstract record available.
Inventors
- 👤 Harold Charnock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:03
CPC Classifications
C; C03; C03B; C03B25/00; C03B25/04; C03B25/10; C03B25/12; C03B18/00; C03B18/02; C03B18/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2968893A
Cited
US3352657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |