US2974368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the fabrication of electrostatic recording heads
Assignee: Unisys Corp
•
Filing: 1956-09-12
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Granted: 1961-03-14
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Expires: 1976-09-12
Abstract
No abstract record available.
Inventors
- 👤 Cecil R Joyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:13
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/39; B41J2/395; G; G03; G03B; G03B17/00; G03B17/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1502343A
Cited
US1837142A
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US2215066A
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US2334534A
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US2402338A
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US2685107A
Cited
US2719775A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |