Patent US2884780A successfully refreshed from Google Patents.
US2884780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall of interlocked blocks
Assignee: Individual
•
Filing: 1954-04-16
•
Granted: 1959-05-05
•
Expires: 1974-04-16
Abstract
No abstract record available.
Inventors
- 👤 Ramirez Tomas Chavez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:45
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2/28; E04B2002/0202; E04B2002/0232; E04B2002/0234; E04B2002/0236; E04B2002/0297
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |