US3820292B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structure
Assignee: —
•
Filing: 1972-05-22
•
Granted: 1988-12-20
•
Expires: 1992-05-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:34
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B1/3211; E04B1/343; E04B1/34315; E04B1/34321; E04B2001/327; E04B2001/3276; E04B2001/3288; E04B2001/3294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |