US3289381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handrails
Assignee: Blumcraft of Pittsburgh LP
•
Filing: 1964-06-26
•
Granted: 1966-12-06
•
Expires: 1984-06-26
Abstract
No abstract record available.
Inventors
- 👤 Blum Louis
- 👤 Jr William J Horgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:57
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1836; E04F11/1838
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1135817A
Cited
US1795716A
Cited
US1757686A
Cited
US2158291A
Cited
US2309149A
Cited
GB567071A
Cited
US2590929A
Cited
US2869829A
Cited
US3164354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |