Patent US3566531A successfully refreshed from Google Patents.
US3566531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mating blocks having beaded studs and resilient sidewalls
Assignee: Individual
•
Filing: 1968-02-15
•
Granted: 1971-03-02
•
Expires: 1988-02-15
Abstract
Abstract HOLLOW, BOX-LIKE TOY BLOCKS OPEN ON THE LOWER SIDE AND HAVING STUDS ON THE UPPER SIDE TO MATE WITH THE OPEN SIDE. THE STUDS MAY HAVE BEADS AND THERE ARE RESILIENT SIDE WALLS FORMING THE OPENING, THE EDGES OF WHICH MAY HAVE NOTCHES TO RECEIVE THE BEADS. SAWTOOTH PROJECTIONS MAY BE PROVIDED ON SAID EDGES, TO BE CAMMED ASIDE BY THE BEADED STUDS. THE BLOCKS MAY HAVE INTERIOR PARTITION WALLS AND DIFFERENT WALLS OF A BLOCK MAY VARY IN FLEXIBILITY. THE STUDS MAY BE HOLLOW AND THE WALLS APERTURED TO ALLOW OTHER ELEMENTS TO PASS INTO THE BLOCK INTERIOR.
Inventors
- 👤 Heinz Hasel
- 👤 Otto Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:44
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04; A63H33/06; A63H33/062; A63H33/065; A63H33/08; A63H33/086
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |