US2810180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stone mold
Assignee: Individual
•
Filing: 1954-06-25
•
Granted: 1957-10-22
•
Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Henry C Barnack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:50
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/02; E04F13/07; E04F13/08; E04F13/14; E04F13/147; E04F21/00; E04F21/02; E04F21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194554A
Cited
US868284A
Cited
US1933237A
Cited
US1960276A
Cited
US2151597A
Cited
US2505342A
Cited
US2517432A
Cited
US2648887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |