US2785757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paraffin scraper
Assignee: Individual
•
Filing: 1955-07-29
•
Granted: 1957-03-19
•
Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 William H Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:48
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B37/04; E21B37/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1122246A
Cited
US1631509A
Cited
US2257080A
Cited
US2326528A
Cited
US2392144A
Cited
US2661024A
Cited
US2655996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |