US2650169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorescent coated sheet material
Assignee: Individual
•
Filing: 1949-09-28
•
Granted: 1953-08-25
•
Expires: 1969-09-28
Abstract
No abstract record available.
Inventors
- 👤 Goldstein Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:05
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/53; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/917; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A SHEET HAVING A PHOSPHORESENT COATING HAVING PHOSPHORESCENT CRYSTAL PIGMENTS COMPOSED OF SUBSTANTIALLY 50% CRYSTALS HAVING CALCIUM STRONTIUM SULPHIDES IN THE RATIO OF 15 AND 85 PERCENT RESPECTIVELY, AND 50% CRYSTALS HAVING STRONTIUM AND CALCIUM SULPHIDES IN THE RATIO OF 8 AND 92% RESPECTIVELY.
Claim 2
Dependent Claim
44 words
A SHEET HAVING A PHOSPHORESENT COATING HAVING PHOSPHORESCENT CRYSTAL PIGMENTS COMPOSED OF SUBSTANTIALLY 50% CRYSTALS HAVING CALCIUM STRONTIUM SULPHIDES IN THE RATIO OF 15 AND 85 PERCENT RESPECTIVELY, AND 50% CRYSTALS HAVING STRONTIUM AND CALCIUM SULPHIDES IN THE RATIO OF 8 AND 92% RESPECTIVELY.
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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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |