Patent US3516644A successfully refreshed from Google Patents.
US3516644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handrail support means
Assignee: Blumcraft of Pittsburgh LP
•
Filing: 1969-06-23
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Granted: 1970-06-23
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Expires: 1989-06-23
Abstract
No abstract record available.
Inventors
- 👤 William J Horgan Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:51
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1836; Y; Y10; Y10T; Y10T403/00; Y10T403/59
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1926798A
Cited
US2003144A
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US2433617A
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US2904314A
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US3071350A
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US3157378A
Cited
US3367727A
Cited
US3441253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |