US2928468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for boring wells
Assignee: Vodafone GmbH
•
Filing: 1955-03-22
•
Granted: 1960-03-15
•
Expires: 1975-03-22
Abstract
No abstract record available.
Inventors
- 👤 Wienands Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:33
CPC Classifications
E; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/10; E03B3/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US293271A
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US2126575A
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US2702180A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |