US3012711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone dial controlled perforator
Assignee: International Business Machines Corp
•
Filing: 1957-12-30
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Granted: 1961-12-12
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Donald C Croll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:36
CPC Classifications
H; H03; H03M; H03M1/00; H04; H04M; H04M1/00; H04M1/24; H04M1/26; H04M1/27; H04M1/274; H04M1/2745; H04M1/275
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |