US3730820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Softwood-hardwood laminated panel
Assignee: Individual
•
Filing: 1971-07-19
•
Granted: 1973-05-01
•
Expires: 1991-07-19
Abstract
Abstract A HIGH STRENGTH, LIGHTWEIGHT, LAMINATED PANEL INCLUDES BOARDS COMPOSED OF HARDWOOD STRIPS GLUED TO SOFTWOOD STRIPS. D R A W I N G
Inventors
- 👤 W Fields
- 👤 R Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:51
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/12; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T428/00; Y10T428/17; Y10T428/18; Y10T428/24; Y10T428/24058; Y10T428/24066
Claims Analysis
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |