US2980574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic sheet material
Assignee: Crane Composites Inc
•
Filing: 1956-05-28
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Granted: 1961-04-18
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred B Menzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/54; B; B29; B29C; B29C70/00; B29C70/003; B29K; B29K2309/00; B29K2309/08; Y; Y10; Y10S; Y10S116/00; Y10S116/14; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A LAMINATED STRUCTURE COMPRISING A PAIR OF FIBERGLASS SHEETS A CENTER FIBER SHEET INTERPOSED BETWEEN SAID PAIR OF SHEETS AND CARRYING ON ONE SIDE THEREOF A PRINTED DESIGN, EACH OF SAID SHEETS BEING IMPREGNATED WITH RESIN AND EACH HAVING SUBSTANTIALLY THE SAME REFRACTIVE INDEX AS SAID RESIN WHEREBY THE FIBERS OF SAID SHEETS ARE
Claim 2
Dependent Claim
54 words
A LAMINATED STRUCTURE COMPRISING A PAIR OF FIBERGLASS SHEETS A CENTER FIBER SHEET INTERPOSED BETWEEN SAID PAIR OF SHEETS AND CARRYING ON ONE SIDE THEREOF A PRINTED DESIGN, EACH OF SAID SHEETS BEING IMPREGNATED WITH RESIN AND EACH HAVING SUBSTANTIALLY THE SAME REFRACTIVE INDEX AS SAID RESIN WHEREBY THE FIBERS OF SAID SHEETS ARE
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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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |