US2870996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knockdown adjustable railing
Assignee: NAT ALUMINUM PRODUCTS Co
•
Filing: 1957-06-06
•
Granted: 1959-01-27
•
Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Herbert M Helt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:26
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1817; E04F11/1834
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1956767A
Cited
US2431546A
Cited
US2558142A
Cited
US2754092A
Cited
US2715513A
Cited
US2687283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |