US2590899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the dry development of diazotype photographic paper
Assignee: Individual
•
Filing: 1945-12-29
•
Granted: 1952-04-01
•
Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 Walter O Snelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:32
CPC Classifications
G; G03; G03D; G03D7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB332631A
Cited
US1559980A
Cited
US1659841A
Cited
US1841653A
Cited
US1745655A
Cited
US1722100A
Cited
US1743012A
Cited
US1759483A
Cited
US1761304A
Cited
US1817198A
Cited
US1844986A
Cited
US1904551A
Cited
US1980469A
Cited
US2047104A
Cited
US2058983A
Cited
US2208106A
Cited
US2288165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |