US2469563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lapping machine
Assignee: AT&T Inc
•
Filing: 1947-04-04
•
Granted: 1949-05-10
•
Expires: 1967-04-04
Abstract
No abstract record available.
Inventors
- 👤 Robert K Kinard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:51
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/04; B24B37/07; B24B37/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US17993A
Cited
DE527356C
Cited
US1486342A
Cited
US1491103A
Cited
US1491102A
Cited
US2353171A
Cited
US2412306A
Cited
US2423118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |