US2821274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structures
Assignee: Individual
•
Filing: 1951-12-20
•
Granted: 1958-01-28
•
Expires: 1971-12-20
Abstract
No abstract record available.
Inventors
- 👤 Anders C Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:58
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1815065A
Cited
US2048981A
Cited
US2078620A
Cited
US2192359A
Cited
US2156670A
Cited
US2166889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |