US3515343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correction entry circuit
Assignee: Leeds and Northrup Co
•
Filing: 1966-03-14
•
Granted: 1970-06-02
•
Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 John W Schwartzenberg
- 👤 Bernard Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:36
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/58; C; C21; C21C; C21C5/00; C21C5/28; C21C5/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2905879A
Cited
US2919401A
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US3243699A
Cited
US3176518A
Cited
US3242489A
Cited
US3280312A
Cited
US3359410A
Cited
US3392914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |