US2327482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral cutting and piercing
Assignee: Linde Air Products Co
•
Filing: 1939-04-18
•
Granted: 1943-08-24
•
Expires: 1959-04-18
Abstract
No abstract record available.
Inventors
- 👤 Robert B Aitchison
- 👤 Charles W Swartout
- 👤 Virgil C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:48
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14; Y; Y10; Y10S; Y10S266/00; Y10S266/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-08-23 | 1947-02-22 | 1947-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-23 | 1951-02-22 | 1951-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-23 | 1955-02-22 | 1955-08-24 | $7700.00 | Window Closed / Lapsed |