US2451253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making chain links
Assignee: Individual
•
Filing: 1943-10-14
•
Granted: 1948-10-12
•
Expires: 1963-10-14
Abstract
No abstract record available.
Inventors
- 👤 Pierre Henry St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:57
CPC Classifications
B; B21; B21L; B21L11/00; B21L11/14; B21L5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US658722A
Cited
GB190517973A
Cited
GB191323568A
Cited
US1670758A
Cited
US1838025A
Cited
US1908072A
Cited
US2284824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |