US3527443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handrail post fitting
Assignee: WILLIAM J HORGAN JR
•
Filing: 1969-01-16
•
Granted: 1970-09-08
•
Expires: 1989-01-16
Abstract
No abstract record available.
Inventors
- 👤 Louis Blum
- 👤 William J Horgan Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:37
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F2011/1868; E04F2011/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1611912A
Cited
US1840048A
Cited
US1866112A
Cited
US1926798A
Cited
US2232340A
Cited
US2822986A
Cited
US3455586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |