US2515054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light modulating system
Assignee: AT&T Inc
•
Filing: 1948-08-11
•
Granted: 1950-07-11
•
Expires: 1968-08-11
Abstract
No abstract record available.
Inventors
- 👤 Pagliarulo Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:35
CPC Classifications
H; H04; H04B; H04B10/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1702001A
Cited
GB418603A
Cited
US2155661A
Cited
US2365376A
Cited
US2283545A
Cited
US2326314A
Cited
US2345441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |