US3508464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control apparatus
Assignee: AT&T Inc
•
Filing: 1966-11-04
•
Granted: 1970-04-28
•
Expires: 1986-11-04
Abstract
No abstract record available.
Inventors
- 👤 Vincent Kruchowy
- 👤 Frank Wahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:43
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/22; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8326; Y10T137/8593; Y10T137/86389
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898147A
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FR363560A
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US1437626A
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US1426718A
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US2064053A
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US2127265A
Cited
US2367242A
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US2329686A
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US2674230A
Cited
US2801442A
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US2857964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |