US1245606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing photometric wedges.
Assignee: Individual
•
Filing: 1916-07-14
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Granted: 1917-11-06
•
Expires: 1936-07-14
Abstract
No abstract record available.
Inventors
- 👤 John T Maccurdy
- 👤 Henry N Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42
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) | 1920-11-05 | 1921-05-07 | 1921-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-11-05 | 1925-05-07 | 1925-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-11-05 | 1929-05-07 | 1929-11-06 | $7700.00 | Window Closed / Lapsed |