Patent US557914A successfully refreshed from Google Patents.
Patent US2959256A successfully refreshed from Google Patents.
US2959256A
Expired / Lapsed
US
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Hexagonal structure
Assignee: Individual
•
Filing: 1956-02-09
•
Granted: 1960-11-08
•
Expires: 1976-02-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Deam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:31
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/30; E04C3/32; E04B; E04B1/00; E04B1/18; E04B1/24; E04B1/2403; E04B2001/0053; E04B2001/0084; E04B2001/2415; E04B2001/2448; E04B2001/2454; E04B2001/2457; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/345
Claims Analysis
Total Claims: 0
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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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |