US3539258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical apparatus for document copier
Assignee: AB Dick Co
•
Filing: 1968-01-10
•
Granted: 1970-11-10
•
Expires: 1988-01-10
Abstract
No abstract record available.
Inventors
- 👤 John R Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:11
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/54; G03B27/542
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2985062A
Cited
US3028483A
Cited
US3146661A
Cited
US3263584A
Cited
US3272066A
Cited
US3272067A
Cited
US3312143A
Cited
US3272068A
Cited
US3316804A
Cited
US3428397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |