US1230872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex-writing machine.
Assignee: SIGNATURE Co
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Filing: 1916-06-21
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Granted: 1917-06-26
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Expires: 1936-06-21
Abstract
No abstract record available.
Inventors
- 👤 Frank E Crompton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:58
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/10; B43L13/12
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) | 1920-06-25 | 1920-12-25 | 1921-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-06-25 | 1924-12-25 | 1925-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-06-25 | 1928-12-25 | 1929-06-26 | $7700.00 | Window Closed / Lapsed |