US2716733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable bandwidth band-pass filter
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1950-05-10
•
Granted: 1955-08-30
•
Expires: 1970-05-10
Abstract
No abstract record available.
Inventors
- 👤 James J Roark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161; G; G01; G01V; G01V1/00; G01V1/24; G01V1/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1576459A
Cited
US1681252A
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US1944297A
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US2102138A
Cited
US2209100A
Cited
US2226728A
Cited
GB541251A
Cited
US2340364A
Cited
US2417069A
Cited
US2481247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |