Patent US1523770A successfully refreshed from Google Patents.
US1523770A
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Assignee: Individual
•
Filing: 1921-03-31
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Granted: 1925-01-20
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Expires: 1941-03-31
Abstract
No abstract record available.
Inventors
- 👤 Bengt M W Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:19
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/28; B23Q; B23Q3/00; B23Q3/15; B23Q3/154; B23Q3/1543; B23B2270/00; B23B2270/38; Y; Y10; Y10S; Y10S7/00; Y10S7/901; Y10T; Y10T279/00; Y10T279/23
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) | 1928-01-20 | 1928-07-21 | 1929-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-01-20 | 1932-07-21 | 1933-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-01-20 | 1936-07-21 | 1937-01-20 | $7700.00 | Window Closed / Lapsed |