US3545969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inducing an electrostatic charge pattern on an insulating surface
Assignee: International Business Machines Corp
•
Filing: 1965-07-26
•
Granted: 1970-12-08
•
Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Herrick Jr
- 👤 Alfred H Sporer
- 👤 Clayton V Wilbur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:11
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0618; G03G13/00; G03G13/04; G03G17/00; G03G5/0609; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0635; G03G5/07; G03G5/071; G03G5/072; G03G5/073
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB772873A
Cited
US2833648A
Cited
US2937943A
Cited
US2976144A
Cited
US2979403A
Cited
US3113022A
Cited
US3147679A
Cited
US3281857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |