US3687773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a flooring unit
Assignee: Individual
•
Filing: 1970-06-12
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Granted: 1972-08-29
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Expires: 1990-06-12
Abstract
Abstract THIS DISCLOSURE RELATES TO A COMPOSITE FLOORING WHEREIN EACH FLOORING ELEMENT IS MADE UP OF AT LEAST TWO BOARDS WITH EACH BOARD BEING TAPERED AND WITH THE WIDE END OF ONE BOARD BEING DISPOSED ADJACENT THE NARROW END OF THE NEXT ADJACENT BOARD, AND WHEREIN THE BOARDS MAY BE REINFORCED BY UNDERLYING BOARDS DISPOSED AT RIGHT ANGLES TO THE FIRST BOARDS, ONLY THE EXPOSED BOARDS BEING THE WEARING BOARDS OF THE FLOORING.
Inventors
- 👤 Eric Adolf Wangborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:24
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/03; B32B3/00; B32B3/10; B32B3/14; B27; B27B; B27B1/00; B27M; B27M3/00; B27M3/04; B32B21/00; B32B21/13; B32B3/02; B32B3/06; B32B3/18; B32B7/04; B32B7/12; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/12; E04F; E04F15/00; E04F15/02; E04F15/04; B32B2419/00; B32B2419/04; E04F2201/00; E04F2201/01; E04F2201/0107; E04F2201/02; E04F2201/023; E04F2201/04; E04F2201/043; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T156/1077; Y10T156/1089; Y10T156/1092; Y10T156/1093
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |