US3376682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building blocks with sides converging upwardly
Assignee: JAMES R BRISCOE
•
Filing: 1965-08-04
•
Granted: 1968-04-09
•
Expires: 1985-08-04
Abstract
No abstract record available.
Inventors
- 👤 James R Briscoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2002/0202; E04B2002/0204; E04B2002/0206
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA462177A
Cited
US1604968A
Cited
US1682414A
Cited
GB401557A
Cited
CH200583A
Cited
US2264546A
Cited
US2273898A
Cited
US2482719A
Cited
US2539868A
Cited
US2637995A
Cited
US2708358A
Cited
FR1062347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |