US3467470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable light box and heat developing unit
Assignee: 3M Co
•
Filing: 1967-05-08
•
Granted: 1969-09-16
•
Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Charles A Donnelly Jr
- 👤 Bernard W Gaffron
- 👤 Marvin A Stoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:42
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3092004A
Cited
US3234868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |