Patent US2829503A successfully refreshed from Google Patents.
US2829503A
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Floating pipe driving head
Assignee: Individual
•
Filing: 1956-07-17
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Granted: 1958-04-08
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Expires: 1976-07-17
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:39
CPC Classifications
E; E02; E02D; E02D13/00; E02D13/10; E21; E21B; E21B7/00; E21B7/04; E21B7/046; H; H01; H01R; H01R4/00; H01R4/58; H01R4/66; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17017; Y10T403/00; Y10T403/57; Y10T403/5733; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7086
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |