Patent US2216053A successfully refreshed from Google Patents.
US2980181A
Expired / Lapsed
US
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Window structure
Assignee: EAST COAST MILLWORK Co IN
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Filing: 1958-06-27
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Granted: 1961-04-18
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Expires: 1978-06-27
Abstract
No abstract record available.
Inventors
- 👤 Greenstein Alexander
- 👤 Greenstein Neil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US956766A
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US1503018A
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US1800800A
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US2013824A
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US2107775A
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US2254028A
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US2548556A
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US2571846A
Cited
US2569941A
Cited
US2687557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |