US2957494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry-feed chlorinator and the like
Assignee: Individual
•
Filing: 1955-12-02
•
Granted: 1960-10-25
•
Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Nyyrikki K Stenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; B; B01; B01J; B01J4/00; B01J4/008; C02F1/763; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7668; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7835; Y10T137/7836; Y10T137/8158; Y10T137/8359; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87619; Y10T137/87643; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1073467A
Cited
US1393615A
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US2165342A
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US2213663A
Cited
US2490792A
Cited
US2637690A
Cited
US2680715A
Cited
US2684838A
Cited
US2761464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |