Patent US3438760A successfully refreshed from Google Patents.
US3438760A
Expired / Lapsed
US
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Method of coloring glass
Assignee: Pilkington Group Ltd
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Filing: 1965-06-21
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Granted: 1969-04-15
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Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 David Gordon Loukes
- 👤 Edward Albert Buckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:02
CPC Classifications
C; C03; C03C; C03C21/00; C03C21/007; C03C17/00; C03C17/06; C03C17/09; C03C17/10; C03C21/001; C03C21/005; C03C2217/00; C03C2217/20; C03C2217/25; C03C2217/251; C03C2218/00; C03C2218/10; C03C2218/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |