Patent US3783284A successfully refreshed from Google Patents.
US3240618A
Expired / Lapsed
US
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Concrete form panels
Assignee: United States Plywood Corp
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Filing: 1961-08-22
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Granted: 1966-03-15
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Expires: 1981-08-22
Abstract
No abstract record available.
Inventors
- 👤 Charles B Hemming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:04
CPC Classifications
E; E04; E04G; E04G9/00; E04G9/02; E04G9/05; B; B05; B05D; B05D7/00; B05D7/06; B05D7/08; B05D3/00; B05D3/10; B05D3/104; B05D7/50; B05D7/52; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965; Y10T428/31504; Y10T428/31551; Y10T428/31591; Y10T428/31844; Y10T428/31848; Y10T428/31851
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
IMPROVED PANEL WHICH COMPRISES A FIBROUS BOARD CHARACTERIZED BY HAVING AT LEAST ONE SURFACE COATED WITH FORM OIL AND WHEREIN A POROUS POLYURETHANE FILM IS ADHERED TO THE OIL COATED SURFACE.
Claim 2
Dependent Claim
31 words
IMPROVED PANEL WHICH COMPRISES A FIBROUS BOARD CHARACTERIZED BY HAVING AT LEAST ONE SURFACE COATED WITH FORM OIL AND WHEREIN A POROUS POLYURETHANE FILM IS ADHERED TO THE OIL COATED SURFACE.
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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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |