US2619114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas flow control apparatus
Assignee: Wallace & Tiernan Co Inc
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Filing: 1947-02-07
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Granted: 1952-11-25
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Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 William C Conkling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/763; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/232; B01F23/2326; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F23/237; B01F23/2376; B01F23/23763; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/7287; Y10T137/7339; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |