US2929393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas flow control apparatus
Assignee: US Filter Wallace and Tiernan Inc
•
Filing: 1957-03-21
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Granted: 1960-03-22
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charles F Wallace
- 👤 John O Kirwan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:17
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/763; G; G05; G05D; G05D11/00; G05D11/006; G05D11/02; G05D11/035; G05D23/00; G05D23/19; G05D23/1925; G05D7/00; G05D7/03; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0363; Y10T137/2496; Y10T137/2499; Y10T137/2514; Y10T137/2521; Y10T137/2529; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7809; Y10T137/7812; Y10T137/7814
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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |