US2621397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pore hole seal for double windows
Assignee: PPG Industries Inc
•
Filing: 1949-01-27
•
Granted: 1952-12-16
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Lloyd V Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:35
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/66; E06B3/677
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2053765A
Cited
US2075477A
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US2235681A
Cited
US2402661A
Cited
US2365518A
Cited
US2359163A
Cited
US2462020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |