Patent US3767516A successfully refreshed from Google Patents.
US3767516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate of cotton paper core with resin fluorescent material scribed to expose core
Assignee: Universal Oil Products Co
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Filing: 1971-10-18
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Granted: 1973-10-23
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Expires: 1991-10-18
Abstract
Abstract A fluorescent material is added to the resin which is utilized to coat the core material in an engraving stock. After the surface of the stock is scribed into words or signals and the core material is exposed, the latter will fluoresce when exposed to an external source of light.
Inventors
- 👤 P Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:59
CPC Classifications
B; B44; B44F; B44F1/00; C; C09; C09K; C09K11/00; C09K11/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
The article of manufacture as set forth in claim 1 in which said dye is present in said resin in a range of from about 1 to about 3 percent by wt. of resin solids.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |