Patent US2814836A successfully refreshed from Google Patents.
US2814836A
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Method of producing coated masonry building units
Assignee: Burns and Russell Co
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Filing: 1956-02-01
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Granted: 1957-12-03
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Expires: 1976-02-01
Abstract
No abstract record available.
Inventors
- 👤 Alexander H Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:20
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/04; C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/4505; C04B41/4511; C04B41/60; C04B41/61; C09; C09D; C09D167/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1284933A
Cited
US1659962A
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US1953337A
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US2198688A
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US2601532A
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US2667664A
Cited
US2752275A
Cited
US2751775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |