Patent US2990308A successfully refreshed from Google Patents.
US2990308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent reconnaissance slate
Assignee: Individual
•
Filing: 1959-10-20
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Granted: 1961-06-27
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Expires: 1979-10-20
Abstract
No abstract record available.
Inventors
- 👤 Melvin M Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:55
CPC Classifications
B; B43; B43L; B43L1/00; B43L1/004; B43L1/006; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A SLATE STRUCTURE COMPRISING A BASE SHEET OF TRANSPARENT AND RELATIVELY RIGID PLASTIC MATERIAL, A LAYER OF PHOTO-LUMINESCENT MATERIAL ON ONE FACE OF SAID SHEET AND A WATER-INSOLUBLE MASKING FILM FORMED FROM A MIXTURE OF CARBON BLACK AND A PRESSURE-SENSITIVE SILICONE ADHESIVE
Claim 2
Dependent Claim
42 words
A SLATE STRUCTURE COMPRISING A BASE SHEET OF TRANSPARENT AND RELATIVELY RIGID PLASTIC MATERIAL, A LAYER OF PHOTO-LUMINESCENT MATERIAL ON ONE FACE OF SAID SHEET AND A WATER-INSOLUBLE MASKING FILM FORMED FROM A MIXTURE OF CARBON BLACK AND A PRESSURE-SENSITIVE SILICONE ADHESIVE
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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |