US2980399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow propelled sewer or pipe threader
Assignee: Individual
•
Filing: 1958-06-30
•
Granted: 1961-04-18
•
Expires: 1978-06-30
Abstract
No abstract record available.
Inventors
- 👤 Kendall M Littlefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:09
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/0436; B08B9/053; E; E03; E03F; E03F9/00; B08B2209/00; B08B2209/02; B08B2209/027; B08B2209/04; B08B2209/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US265320A
Cited
US387410A
Cited
GB190004268A
Cited
US934520A
Cited
US920455A
Cited
US979899A
Cited
US1382587A
Cited
FR731297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |