Patent US1225978A successfully refreshed from Google Patents.
US1225978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional meter.
Assignee: Individual
•
Filing: 1915-04-16
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Granted: 1917-05-15
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Expires: 1935-04-16
Abstract
No abstract record available.
Inventors
- 👤 John W Ledoux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:39
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2534; Y10T137/2536; Y10T137/7287; Y10T137/7358; Y10T137/7404
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) | 1920-05-14 | 1920-11-13 | 1921-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-05-14 | 1924-11-13 | 1925-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-05-14 | 1928-11-13 | 1929-05-15 | $7700.00 | Window Closed / Lapsed |