US2789337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inside corner structure for prefabricated forms for composition walls
Assignee: Rocwall Co
•
Filing: 1953-07-02
•
Granted: 1957-04-23
•
Expires: 1973-07-02
Abstract
No abstract record available.
Inventors
- 👤 Arrighini Artil
- 👤 George A Van Sickle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:55
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US310377A
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US830893A
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US1250032A
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US1538496A
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US1552334A
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US1590033A
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US1842684A
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US1901392A
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US2017553A
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US2526529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |