Patent US4304240A successfully refreshed from Google Patents.
US1209944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic pump.
Assignee: Individual
•
Filing: 1916-02-28
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Granted: 1916-12-26
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Expires: 1936-02-28
Abstract
No abstract record available.
Inventors
- 👤 Charles A De Rigne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:32
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1073
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) | 1919-12-26 | 1920-06-26 | 1920-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-12-26 | 1924-06-26 | 1924-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-12-26 | 1928-06-26 | 1928-12-26 | $7700.00 | Window Closed / Lapsed |