Patent US5620459A successfully refreshed from Google Patents.
Patent US3453387A successfully refreshed from Google Patents.
US3453387A
Expired / Lapsed
US
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Data transmission system having delay line buffer storage
Assignee: International Business Machines Corp
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Filing: 1965-10-04
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Granted: 1969-07-01
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 John D Bagley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:11
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/08; G; G06; G06F; G06F3/00; G06F3/09; G11; G11C; G11C21/00; G11C21/005
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |