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Patent US2716531A successfully refreshed from Google Patents.
US2716531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cord holder
Assignee: Individual
•
Filing: 1953-04-22
•
Granted: 1955-08-30
•
Expires: 1973-04-22
Abstract
No abstract record available.
Inventors
- 👤 Johnson Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:31
CPC Classifications
H; H02; H02G; H02G11/00; H02G11/003; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32606; Y10T403/32951; Y10T403/45; Y10T403/459
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US495914A
Cited
US1530529A
Cited
US1999089A
Cited
US2478498A
Cited
US2488255A
Cited
US2546589A
Cited
GB660649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |