US2873486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple glazed unit
Assignee: PPG Industries Inc
•
Filing: 1956-12-10
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Granted: 1959-02-17
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Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:53
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/66; E06B3/67; E06B3/6715; E06B9/00; E06B9/24; E06B9/26; E06B9/264
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |