US3306309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulator unit cleaning machine
Assignee: Individual
•
Filing: 1964-12-08
•
Granted: 1967-02-28
•
Expires: 1984-12-08
Abstract
No abstract record available.
Inventors
- 👤 John G Pahl
- 👤 Emil F Pahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:24
CPC Classifications
H; H01; H01B; H01B19/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA529069A
Cited
US910882A
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US1197324A
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US1428491A
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US1824993A
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US2078699A
Cited
CH232182A
Cited
US2574069A
Cited
FR1113465A
Cited
US3070103A
Cited
FR1284658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |