US2434302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of solidifying porous structures
Assignee: Individual
•
Filing: 1942-07-22
•
Granted: 1948-01-13
•
Expires: 1962-07-22
Abstract
No abstract record available.
Inventors
- 👤 Louis S Wertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:15
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB244671A
Cited
US1954117A
Cited
GB445628A
Cited
US2120468A
Cited
US2081643A
Cited
US2233872A
Cited
US2254252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-12 | 1951-07-14 | 1952-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-12 | 1955-07-14 | 1956-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-12 | 1959-07-14 | 1960-01-13 | $7700.00 | Window Closed / Lapsed |