US2911759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of flat glass
Assignee: Pilkington Group Ltd
•
Filing: 1954-12-06
•
Granted: 1959-11-10
•
Expires: 1974-12-06
Abstract
No abstract record available.
Inventors
- 👤 Lionel A B Pilkington
- 👤 Bickerstaff Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:11
CPC Classifications
C; C03; C03B; C03B18/00; C03B18/02; C03B18/16; C03B13/00; C03B13/04; C03B18/04; C03B18/18; C03B18/20; C03B18/22
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |