US1658797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-producing apparatus
Assignee: Individual
•
Filing: 1927-08-11
•
Granted: 1928-02-14
•
Expires: 1947-08-11
Abstract
No abstract record available.
Inventors
- 👤 Jean B Charette
- 👤 Bernier Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/463
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-02-13 | 1931-08-15 | 1932-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-13 | 1935-08-15 | 1936-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-13 | 1939-08-15 | 1940-02-14 | $7700.00 | Window Closed / Lapsed |