US2683906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pore closure for double glazed units and method of producing same
Assignee: Pittsburgh Corning LLC
•
Filing: 1952-05-15
•
Granted: 1954-07-20
•
Expires: 1972-05-15
Abstract
No abstract record available.
Inventors
- 👤 Donald L Nevins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:36
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/20; C03B23/24; C03B23/245; E; E06; E06B; E06B3/00; E06B3/66; E06B3/677; Y; Y10; Y10T; Y10T403/00; Y10T403/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1296165A
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US2010145A
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US2125372A
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US2345278A
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US2389360A
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US2399526A
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US2549504A
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US2499854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |