US1287793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gold-film.
Assignee: American Optical Corp
•
Filing: 1917-05-05
•
Granted: 1918-12-17
•
Expires: 1937-05-05
Abstract
No abstract record available.
Inventors
- 👤 Edgar D Tillyer
- 👤 Fred M Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:36
CPC Classifications
B; B21; B21B; B21B1/00; B21B1/22; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/49; Y10T29/4981; Y10T29/49812
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) | 1921-12-16 | 1922-06-17 | 1922-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-12-16 | 1926-06-17 | 1926-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-12-16 | 1930-06-17 | 1930-12-17 | $7700.00 | Window Closed / Lapsed |