US2502853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Woven fabric diaphragm with stiffened portions
Assignee: Hartford National Bank and Trust Co
•
Filing: 1948-02-03
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Granted: 1950-04-04
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Expires: 1968-02-03
Abstract
No abstract record available.
Inventors
- 👤 Keddie James Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/02; H04R7/12; H04R9/00; H04R9/06; H04R2231/00; H04R2231/003; H04R2307/00; H04R2307/021; H04R2307/023; H04R2307/025; H04R2307/029; H04R2307/204; H04R7/20; H04R9/02; H04R9/025
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) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |