US2439802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming films and coatings
Assignee: Individual
•
Filing: 1945-01-02
•
Granted: 1948-04-20
•
Expires: 1965-01-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Carleton Shurtleff Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/32; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/91; B29C48/911; B29C48/9135; D21H5/00; D21H5/0005; D21H5/0012
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |