Patent US2820613A successfully refreshed from Google Patents.
US2820613A
Expired / Lapsed
US
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Balustrades
Assignee: Individual
•
Filing: 1956-07-02
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Granted: 1958-01-21
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1836; F; F16; F16B; F16B9/00; F16B9/05; F16B9/052; F16B2200/00; F16B2200/20; Y; Y10; Y10T; Y10T403/00; Y10T403/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2654579A
Cited
US2687283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |