Patent US3522991A successfully refreshed from Google Patents.
US3522991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic copying apparatus
Assignee: Individual
•
Filing: 1967-01-25
•
Granted: 1970-08-04
•
Expires: 1987-01-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Samuel Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:16
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US769343A
Cited
US895034A
Cited
US2200719A
Cited
US2420141A
Cited
US2530396A
Cited
US2633784A
Cited
US3020801A
Cited
US2763180A
Cited
US2869447A
Cited
US3102463A
Cited
US3074312A
Cited
US3164056A
Cited
US3183766A
Cited
US3339451A
Cited
US3375751A
Cited
US3402636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |