Patent US2587951A successfully refreshed from Google Patents.
Patent US2996896A successfully refreshed from Google Patents.
US2996896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable skating rink
Assignee: Individual
•
Filing: 1956-01-23
•
Granted: 1961-08-22
•
Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Ford L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:28
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/10; E01C13/102
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US399968A
Cited
US424512A
Cited
US2021074A
Cited
FR387090A
Cited
FR389447A
Cited
US1918437A
Cited
CH182341A
Cited
US2483789A
Cited
US2433211A
Cited
US2616096A
Cited
US2628364A
Cited
US2767755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |