US2968893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of flat glass in continuous ribbon form
Assignee: Pilkington Group Ltd
•
Filing: 1956-10-16
•
Granted: 1961-01-24
•
Expires: 1976-10-16
Abstract
No abstract record available.
Inventors
- 👤 Pilkington Lionel Alex Bethune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:44
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US710357A
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US789911A
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US2478090A
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US2525203A
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US2556349A
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FR1082879A
Cited
US2826868A
Cited
FR1117465A
Cited
GB769692A
Cited
US2911759A
Cited
US2838800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |