US2572132A
Expired / Lapsed
US
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Transcribing and summarizing system
Assignee: AT&T Inc
•
Filing: 1949-04-27
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Granted: 1951-10-23
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Expires: 1969-04-27
Abstract
No abstract record available.
Inventors
- 👤 Henry A Giroud
- 👤 Gordon C Irwin
- 👤 Lindley A Kille
- 👤 John B Retallack
- 👤 Riggs George
- 👤 Walter B Strickler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:57
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/40; G06F7/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |