US3471079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating vacuum pump
Assignee: Individual
•
Filing: 1967-09-21
•
Granted: 1969-10-07
•
Expires: 1987-09-21
Abstract
No abstract record available.
Inventors
- 👤 Elman B Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
F; F01; F01L; F01L25/00; F01L25/08; F04; F04B; F04B27/00; F04B27/02; F04B3/00; F04B35/00; F04B39/00; F04B39/0005; F04B39/04; F04B39/06; F04B39/12; F04B7/00; F04B7/04; F04B7/045; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/111; F04B9/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1564215A
Cited
US3068794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |