US2473986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purification unit
Assignee: Wallace & Tiernan Co Inc
•
Filing: 1945-10-18
•
Granted: 1949-06-21
•
Expires: 1965-10-18
Abstract
No abstract record available.
Inventors
- 👤 Booth George Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:22
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/001; C02F1/002; C02F2201/00; C02F2201/002; C02F2201/004; C02F2201/006; C02F2201/009; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/208; Y02A20/212; Y10; Y10S; Y10S417/00; Y10S417/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US280828A
Cited
GB189414609A
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US629387A
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US890989A
Cited
GB191420170A
Cited
US1472896A
Cited
US1595345A
Cited
US1595344A
Cited
FR659691A
Cited
US1919040A
Cited
US1966274A
Cited
US2084346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |