US2985257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator for stairways
Assignee: AMERICAN STAIR GLIDE CORP
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Filing: 1957-12-16
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Granted: 1961-05-23
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Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Floyd H Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:33
CPC Classifications
B; B66; B66B; B66B9/00; B66B9/06; B66B9/08; B66B9/0807; B66B9/083; B66B1/00; B66B1/02; B66B1/06; B66B1/14; B66B1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |