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Patent US2728225A successfully refreshed from Google Patents.
US2024006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard perforator and counter
Assignee: AT&T Teletype Corp
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Filing: 1932-03-25
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Granted: 1935-12-10
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Expires: 1952-03-25
Abstract
No abstract record available.
Inventors
- 👤 Howard L Krum
- 👤 Albert H Reiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:24
CPC Classifications
B; B41; B41B; B41B25/00
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) | 1938-12-09 | 1939-06-10 | 1939-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-09 | 1943-06-10 | 1943-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-09 | 1947-06-10 | 1947-12-10 | $7700.00 | Window Closed / Lapsed |