US3513547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular staircase
Assignee: Individual
•
Filing: 1968-10-04
•
Granted: 1970-05-26
•
Expires: 1988-10-04
Abstract
No abstract record available.
Inventors
- 👤 Abraham Suckno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:27
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/022; E04F11/032; E04F11/104; E04F11/108; E04F2011/0203; E04F2011/0205; E04F2011/0207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE233229C
Cited
US400470A
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US839846A
Cited
US1415739A
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US1446454A
Cited
US1501977A
Cited
US1716713A
Cited
US3233377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |