Patent US2871535A successfully refreshed from Google Patents.
US2871535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent mold and method for making cast chain link
Assignee: Individual
•
Filing: 1956-10-02
•
Granted: 1959-02-03
•
Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 John S Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:49
CPC Classifications
B; B22; B22D; B22D25/00; B22D25/02; B22D25/023
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1378984A
Cited
US1639456A
Cited
US1841173A
Cited
US1956910A
Cited
US2116630A
Cited
US2540199A
Cited
US2748433A
Cited
US2764790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |