Patent US2845684A successfully refreshed from Google Patents.
US2845684A
Expired / Lapsed
US
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Prefabricated form with sill member
Assignee: ROCKWALL Co
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Filing: 1954-08-16
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Granted: 1958-08-05
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Bell Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:53
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/02; E04G15/00; E04G15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511829A
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US1055237A
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US1109934A
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US1142887A
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US2021210A
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US2262859A
Cited
US2535277A
Cited
US2638774A
Cited
US2618038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |