US2801895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocked-joint structures
Assignee: WALTER A DUCKWORTH
•
Filing: 1954-08-23
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Granted: 1957-08-06
•
Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Howard S Gass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:17
CPC Classifications
F; F16; F16B; F16B12/00; A; A47; A47B; A47B88/00; A47B88/90; A47B88/941; B; B27; B27F; B27F1/00; F16B12/10; F16B12/12; F16B12/24; A47B2230/00; A47B2230/0074; A47B2230/0077; F16B2200/00; F16B2200/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US242026A
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US325049A
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US713655A
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US786940A
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US873496A
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US2065133A
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US2604213A
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US2510243A
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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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |