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US2769518A
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Assignee: SPIEGEL Inc
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Filing: 1954-06-22
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Granted: 1956-11-06
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Expires: 1974-06-22
Abstract
No abstract record available.
Inventors
- 👤 Charles E Faulkner
- 👤 Ralph R Brouwer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:08
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US749836A
Cited
GB189909688A
Cited
US1975791A
Cited
GB384653A
Cited
US2318325A
Cited
US2390413A
Cited
US2461451A
Cited
US2557061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |