Patent US2672670A successfully refreshed from Google Patents.
US2672670A
Expired / Lapsed
US
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Method of making building material
Assignee: Individual
•
Filing: 1949-02-18
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Granted: 1954-03-23
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Expires: 1969-02-18
Abstract
No abstract record available.
Inventors
- 👤 Eugene T Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:47
CPC Classifications
B; B28; B28B; B28B3/00; B28B7/00; B28B7/0064; B28B7/0073; C; C04; C04B; C04B28/00; C04B28/02; C04B40/00; C04B40/02; C04B40/0259
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2170434A
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US2246537A
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US2383736A
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US2407514A
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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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |