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US2370472A
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Vitreous compositions consisting of oxides of alkali metal, phosphorus, and other selected divalent metal
Assignee: BLOCKSON CHEMICAL Co
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Filing: 1940-10-07
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Granted: 1945-02-27
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Expires: 1960-10-07
Abstract
No abstract record available.
Inventors
- 👤 Charles S King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:45
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/45; C02; C02F; C02F5/00; C02F5/08; C02F5/086; C03; C03C; C03C3/00; C03C3/12; C03C3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-02-27 | 1948-08-28 | 1949-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-02-27 | 1952-08-28 | 1953-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-02-27 | 1956-08-28 | 1957-02-27 | $7700.00 | Window Closed / Lapsed |