US2442422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making building material
Assignee: Individual
•
Filing: 1944-03-02
•
Granted: 1948-06-01
•
Expires: 1964-03-02
Abstract
No abstract record available.
Inventors
- 👤 Fred R Loetscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:38
CPC Classifications
B; B32; B32B; B32B27/00; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/3196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1410899A
Cited
US1597539A
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US1673239A
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US1776790A
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US1779426A
Cited
US1997359A
Cited
US2115496A
Cited
US2227212A
Cited
US2333875A
Cited
US2343740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |