US3289100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Niobate maser materials and devices made therefrom
Assignee: AT&T Inc
•
Filing: 1963-04-25
•
Granted: 1966-11-29
•
Expires: 1983-04-25
Abstract
No abstract record available.
Inventors
- 👤 Albert A Ballman
- 👤 Sergio P S Porto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:01
CPC Classifications
H; H01; H01S; H01S1/00; H01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A CRYSTALLINE COMPOSITION OF MATTER HAVING THE EMPIRICAL FORMULA
Claim 2
Dependent Claim
9 words
A CRYSTALLINE COMPOSITION OF MATTER HAVING THE EMPIRICAL FORMULA
References Cited (Backward Citations)
US2853392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |