Patent US2601532A successfully refreshed from Google Patents.
US2601532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making faced building blocks and the like
Assignee: Individual
•
Filing: 1949-08-19
•
Granted: 1952-06-24
•
Expires: 1969-08-19
Abstract
No abstract record available.
Inventors
- 👤 James A Knighton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:10
CPC Classifications
B; B28; B28B; B28B19/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US60310A
Cited
US719244A
Cited
US862367A
Cited
US1086116A
Cited
US1164099A
Cited
US1170791A
Cited
US1486056A
Cited
US1550950A
Cited
US1676153A
Cited
US1701619A
Cited
US2018192A
Cited
US2032164A
Cited
US2189872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |