US2981383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking i-beam for roof and side wall structure
Assignee: Individual
•
Filing: 1960-05-23
•
Granted: 1961-04-25
•
Expires: 1980-05-23
Abstract
No abstract record available.
Inventors
- 👤 Harold S Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:12
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/06; E04B; E04B1/00; E04B1/18; E04B1/24; E04B1/2403; E04B5/00; E04B5/02; E04B5/14; E04C3/30; E04C3/32; E06; E06B; E06B9/00; E06B9/52; E04B2001/2415; E04B2001/2454; E04B2001/2457; E04C2003/0404; E04C2003/0408; E04C2003/0421; E04C2003/0426; E04C2003/0434; E04C2003/0443; E04C2003/0452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US563530A
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US1231564A
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US1662766A
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US2097580A
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US2211384A
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US2617502A
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US2897889A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |