Patent US2729397A successfully refreshed from Google Patents.
US2729397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weston
Assignee: —
•
Filing: —
•
Granted: 1956-01-03
•
Expires: 1973-01-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:08
CPC Classifications
B; B02; B02C; B02C25/00; B02C13/00; B02C13/26; B02C13/286; B02C17/00; B02C17/18; B02C17/183; B02C21/00; B02C23/00; B02C23/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |