Patent US2470918A successfully refreshed from Google Patents.
US2470918A
Expired / Lapsed
US
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Method of impregnating and decorating cementitious materials
Assignee: Individual
•
Filing: 1942-07-23
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Granted: 1949-05-24
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Expires: 1962-07-23
Abstract
No abstract record available.
Inventors
- 👤 Chung Ling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:13
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/60; C04B41/61; C04B41/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1729057A
Cited
US1160363A
Cited
US1729056A
Cited
US1741477A
Cited
US1776622A
Cited
US1902627A
Cited
US2288633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |