US1830902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra-violet transmitting substance
Assignee: Corning Glass Works
•
Filing: 1928-09-21
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Granted: 1931-11-10
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Expires: 1948-09-21
Abstract
No abstract record available.
Inventors
- 👤 Hood Harrison Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:56
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/089; C03C3/091; C03C3/093; C03C3/12; C03C3/16; C03C4/00; C03C4/0085; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/905
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) | 1934-11-09 | 1935-05-11 | 1935-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-09 | 1939-05-11 | 1939-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-09 | 1943-05-11 | 1943-11-10 | $7700.00 | Window Closed / Lapsed |