US1557796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental film support
Assignee: Individual
•
Filing: 1923-11-23
•
Granted: 1925-10-20
•
Expires: 1943-11-23
Abstract
No abstract record available.
Inventors
- 👤 William A Bonar
- 👤 Howard F Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:49
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04; G03B42/042; A; A61; A61B; A61B6/00; A61B6/44; A61B6/4429; A61B6/4435; A61B6/50; A61B6/51; A61B6/512
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-10-19 | 1929-04-20 | 1929-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-10-19 | 1933-04-20 | 1933-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-10-19 | 1937-04-20 | 1937-10-20 | $7700.00 | Window Closed / Lapsed |