Patent US2252464A successfully refreshed from Google Patents.
US3470542A
Expired / Lapsed
US
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Modular system design
Assignee: Wang Laboratories Inc
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Filing: 1967-03-17
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Granted: 1969-09-30
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Expires: 1987-03-17
Abstract
No abstract record available.
Inventors
- 👤 Frank M Trantanella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:46
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/42; G06F13/4204; G06F13/4208; G06F13/4213; G06F12/00; G06F12/02; G06F12/06; G06F12/0646; G06F12/0653; G06F12/0661
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2995411A
Cited
US2997693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |