US1454997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal detector
Assignee: Individual
•
Filing: 1922-04-18
•
Granted: 1923-05-15
•
Expires: 1942-04-18
Abstract
No abstract record available.
Inventors
- 👤 Greco Gaetano
- 👤 Karl G Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:27
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/30; H10D; H10D99/00; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W76/00; H10W76/60; H10W78/00; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; H10W90/00; H10W90/701; H10W90/751; H10W90/753; H10W90/754
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1926-05-14 | 1926-11-13 | 1927-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-05-14 | 1930-11-13 | 1931-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-05-14 | 1934-11-13 | 1935-05-15 | $7700.00 | Window Closed / Lapsed |