Patent US3020523A successfully refreshed from Google Patents.
US3020523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auto key reminder
Assignee: Individual
•
Filing: 1960-06-13
•
Granted: 1962-02-06
•
Expires: 1980-06-13
Abstract
No abstract record available.
Inventors
- 👤 William R Mckeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:14
CPC Classifications
E; E05; E05B; E05B45/00; E05B45/06; E05B45/0605; Y; Y10; Y10T; Y10T70/00; Y10T70/80; Y10T70/8432
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |