US2885506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure sensitive control devices
Assignee: AT&T Inc
•
Filing: 1955-04-28
•
Granted: 1959-05-05
•
Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Paul E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:05
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4083; A47L11/4088; C; C23; C23G; C23G3/00; F; F16; F16P; F16P7/00; F16P7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1340086A
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US1396491A
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DE452424C
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US1782316A
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US1914518A
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US2170341A
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US2439561A
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US2517820A
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US2680168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |