US2931924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quartz oscillator unit for operation at low temperatures
Assignee: Individual
•
Filing: 1958-06-25
•
Granted: 1960-04-05
•
Expires: 1978-06-25
Abstract
No abstract record available.
Inventors
- 👤 Philip A Simpson
- 👤 Barclay Catherine
- 👤 Francis P Phelps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:47
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/02007; H03H9/02015; H03H9/02023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
FOR USE AS A RESONATOR AT A TEMPERATURE LYING WITHIN, A RANGE EXTENDING FROM ABOUT -268.9*C. TO ABOUT
Claim 2
Dependent Claim
18 words
FOR USE AS A RESONATOR AT A TEMPERATURE LYING WITHIN, A RANGE EXTENDING FROM ABOUT -268.9*C. TO ABOUT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |