US1971650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling and injecting apparatus
Assignee: Individual
•
Filing: 1933-12-30
•
Granted: 1934-08-28
•
Expires: 1953-12-30
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Furman
- 👤 Edmund F Heard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; F16L41/06; F16L55/00; F16L55/16; F16L55/168; Y; Y10; Y10S; Y10S29/00; Y10S29/026; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/51; Y10T29/5104; Y10T29/5105; Y10T29/5108; Y10T408/00; Y10T408/44; Y10T408/55; Y10T408/561; Y10T408/5623; Y10T408/56245
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) | 1937-08-27 | 1938-02-26 | 1938-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-27 | 1942-02-26 | 1942-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-27 | 1946-02-26 | 1946-08-28 | $7700.00 | Window Closed / Lapsed |