US3527501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant vibratory impulse plow
Assignee: Shell USA Inc
•
Filing: 1968-01-04
•
Granted: 1970-09-08
•
Expires: 1988-01-04
Abstract
No abstract record available.
Inventors
- 👤 Howard L Shatto Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:58
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/30; E02F5/32; E02F5/326; B; B06; B06B; B06B3/00; E02F5/02; E02F5/10; E02F5/102; E02F5/103; Y; Y10; Y10S; Y10S37/00; Y10S37/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US246352A
Cited
GB483893A
Cited
US3008528A
Cited
US3151191A
Cited
US3215209A
Cited
US3367716A
Cited
US3437381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |