US2720290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamp assembly for structural elements
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1951-06-05
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Granted: 1955-10-11
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Expires: 1971-06-05
Abstract
No abstract record available.
Inventors
- 👤 Henry G Henrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:25
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/3605; E04B; E04B7/00; E04B7/02; E04B1/00; E04B1/18; E04B1/24; E04B1/2403; E04B2001/2424; E04B2001/2454
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |