Patent US2857923A successfully refreshed from Google Patents.
Patent US1413621A successfully refreshed from Google Patents.
US1413621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wilhelm helmttth schweitzer
Assignee: —
•
Filing: —
•
Granted: 1922-04-25
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Expires: 1939-04-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:49
CPC Classifications
D; D21; D21H; D21H11/00; D21H11/14; D06; D06M; D06M11/00; D06M11/32; D06M11/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-04-24 | 1925-10-24 | 1926-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-04-24 | 1929-10-24 | 1930-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-04-24 | 1933-10-24 | 1934-04-25 | $7700.00 | Window Closed / Lapsed |