US2600525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular glass of increased durability
Assignee: Pittsburgh Corning LLC
•
Filing: 1947-03-12
•
Granted: 1952-06-17
•
Expires: 1967-03-12
Abstract
No abstract record available.
Inventors
- 👤 Walter D Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:31
CPC Classifications
C; C03; C03C; C03C11/00; C03C11/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2123536A
Cited
GB490168A
Cited
US2255236A
Cited
US2233608A
Cited
US2306310A
Cited
US2445298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |