US3292129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon thermistors
Assignee: WR Grace and Co
•
Filing: 1965-09-24
•
Granted: 1966-12-13
•
Expires: 1985-09-24
Abstract
No abstract record available.
Inventors
- 👤 Moises G Sanchez
- 👤 Wayne T Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
A THERMISTOR OF SILICON HAVING N-TYPE POLARITY COMPRISING COPPER LEADS SOLDERED TOA SINGLE CRYSTAL OF SAID N-TYPE SILICON NICKEL PLATED AT ENDS AND CONTAINING LESS THAN 100 PARTS PER BILLION OF IMPURITIES DOPED WITH ABOUT 10 TO 100 PARTS PER BILLION OF GOLD WHEREIN THE EX-
References Cited (Backward Citations)
US2739046A
Cited
US2953759A
Cited
US2813048A
Cited
US2860219A
Cited
US2871330A
Cited
US3030189A
Cited
US3061739A
Cited
US3089108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |