US2506593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring hook
Assignee: Byron Jackson Co
•
Filing: 1945-04-28
•
Granted: 1950-05-09
•
Expires: 1965-04-28
Abstract
No abstract record available.
Inventors
- 👤 Richard K Hertel
- 👤 Garth F Nicolson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:38
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; E21B19/04; F; F16; F16B; F16B45/00; F16B45/02; F16B45/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605187A
Cited
US1922386A
Cited
US2058186A
Cited
US2058187A
Cited
US2158372A
Cited
US2158232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |