US3410477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum pump
Assignee: Individual
•
Filing: 1968-01-31
•
Granted: 1968-11-12
•
Expires: 1988-01-31
Abstract
No abstract record available.
Inventors
- 👤 Hartley Ezra Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:47
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/02; F04B39/00; F04B39/0005; F04B39/10; F04B39/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1652565A
Cited
US1116998A
Cited
US1474769A
Cited
US1842027A
Cited
US2246932A
Cited
US2404079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |