US2924173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well perforator firing means
Assignee: Welex Inc
•
Filing: 1956-06-19
•
Granted: 1960-02-09
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Expires: 1976-06-19
Abstract
No abstract record available.
Inventors
- 👤 John J Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:02
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05; E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; E21B43/118; Y; Y10; Y10T; Y10T83/00; Y10T83/364
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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |