Patent US2875794A successfully refreshed from Google Patents.
US2875794A
Expired / Lapsed
US
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Multiple sheet glazing units
Assignee: Libbey Owens Ford Glass Co
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Filing: 1956-05-10
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Granted: 1959-03-03
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 William E Schmertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:28
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/66; E06B3/677; E06B3/6775
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711238A
Cited
US1945769A
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US2030869A
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US2062747A
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US2069086A
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US2398371A
Cited
US2707390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |