Patent DE280021C successfully refreshed from Google Patents.
US2566622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural member
Assignee: CRESSWELL ROLL FORMING Co
•
Filing: 1949-09-01
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Granted: 1951-09-04
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Expires: 1969-09-01
Abstract
No abstract record available.
Inventors
- 👤 William R Millier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/56; E04B2/58; E04B2/60; E04B2/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1133138A
Cited
US1863995A
Cited
US2105771A
Cited
US2144804A
Cited
US2271250A
Cited
GB560814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |