Patent US4878982A successfully refreshed from Google Patents.
Patent US2900176A successfully refreshed from Google Patents.
US2900176A
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Automatic fluid distribution system
Assignee: AT&T Inc
•
Filing: 1957-04-10
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Granted: 1959-08-18
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Expires: 1977-04-10
Abstract
No abstract record available.
Inventors
- 👤 Christopher J Krogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:18
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/20; D06B23/205; B; B01; B01F; B01F25/00; B01F25/50; B01F33/00; B01F33/80; D21; D21H; D21H21/00; D21H21/14; D21H21/28; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2534; Y10T137/2536; Y10T137/7287; Y10T137/7303
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2555250A
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US2608392A
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US2776119A
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US2792912A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |