Patent US3508945A successfully refreshed from Google Patents.
US3508945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial skating surface
Assignee: Vinyl Plastics Inc
•
Filing: 1967-09-28
•
Granted: 1970-04-28
•
Expires: 1987-09-28
Abstract
No abstract record available.
Inventors
- 👤 Laurence F Haemer
- 👤 Randolph C Mcculley
- 👤 Vincent J Stoltz Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:23
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/10; E01C13/107
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2332514A
Cited
US2335958A
Cited
US2567804A
Cited
US2500573A
Cited
US3055297A
Cited
US3171699A
Cited
US3407713A
Cited
US3431203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |