Patent US412713A successfully refreshed from Google Patents.
US412713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
sayers
Assignee: —
•
Filing: 1888-06-16
•
Granted: 1889-10-08
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Expires: 1908-06-16
Abstract
Abstract 10,071. Kahnt, 0. April 22. Floors.-Rabbeted interlocking squares are constructed of double layers of planks a arranged at right-angles to one another, and with the ends projecting beyond the sides. These flooring squares are fastened together by dowels d, and to the beams B by nails through the lower projecting g edges a<1>.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:16
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/14; F21V21/16; F21V21/36; F21V21/38; H; H02; H02G; H02G11/00; H02G11/02; F21V21/30; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3916; Y10T24/3927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1892-10-07 | 1893-04-08 | 1893-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1896-10-07 | 1897-04-08 | 1897-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1900-10-08 | 1901-04-09 | 1901-10-09 | $7700.00 | Window Closed / Lapsed |