US3898781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent paving tile structure
Assignee: Individual
•
Filing: 1969-11-17
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Granted: 1975-08-12
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Expires: 1989-11-17
Abstract
Abstract A transparent paving tile structure having at least one closed gap therein partially filled of fluid and arranged to provide continuously moving images.
Inventors
- 👤 Bruno Facchini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:59
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/02; B; B44; B44C; B44C5/00; B44C5/005; B44F; B44F1/00; B44F1/06; B44F1/066; B44F1/08; B44F1/10; E04F13/00; E04F13/07; E04F13/08; E04F13/0871
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A paving tile having two parallel spaced apart walls joined at their edges to define a closed interspace therebetween, a viscous liquid partially filling said interspace and containing air bubbles therein, said walls being made of transparent resilient material there by to allow, upon treading, deformation thereof causing a random movement of said bubbles.
Claim 2
Dependent Claim
54 words
A paving tile having two parallel spaced apart walls joined at their edges to define a closed interspace therebetween, a viscous liquid partially filling said interspace and containing air bubbles therein, said walls being made of transparent resilient material there by to allow, upon treading, deformation thereof causing a random movement of said bubbles.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |