Patent US1674907A successfully refreshed from Google Patents.
US1798505A
Expired / Lapsed
US
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Building block and method of making the same
Assignee: Individual
•
Filing: 1929-03-18
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Granted: 1931-03-31
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Expires: 1949-03-18
Abstract
No abstract record available.
Inventors
- 👤 Francis J Straub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:47
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B18/00; C04B18/04; C04B18/06; C04B20/00; C04B20/10; C04B20/1055; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S425/00; Y10S425/101; Y10S425/111
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) | 1934-03-30 | 1934-09-29 | 1935-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-03-30 | 1938-09-29 | 1939-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-03-30 | 1942-09-29 | 1943-03-31 | $7700.00 | Window Closed / Lapsed |