US2491620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable film developing apparatus
Assignee: Individual
•
Filing: 1947-06-04
•
Granted: 1949-12-20
•
Expires: 1967-06-04
Abstract
No abstract record available.
Inventors
- 👤 William F Packard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:15
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/4673; Y10T137/474; Y10T137/4807; Y10T137/8593; Y10T137/86187; Y10T137/86911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR352243A
Cited
GB190820396A
Cited
US1079288A
Cited
US1037664A
Cited
US1022196A
Cited
US1546552A
Cited
DE407243C
Cited
US1705940A
Cited
US2391196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |