Patent US3458025A successfully refreshed from Google Patents.
US3458025A
Expired / Lapsed
US
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Protective device for moving stairways
Assignee: Nest Inc
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Filing: 1967-12-20
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Granted: 1969-07-29
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Expires: 1987-12-20
Abstract
No abstract record available.
Inventors
- 👤 Henry L Earle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:35
CPC Classifications
B; B66; B66B; B66B29/00; B66B29/02; B66B29/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3126084A
Cited
US2782896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |