US3301870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallochromic indicators and method of producing same
Assignee: Individual
•
Filing: 1960-09-19
•
Granted: 1967-01-31
•
Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Terzijska Drahomira
- 👤 Svoboda Vlastimil
- 👤 Korbl Jiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:02
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/06; C09B11/08; G; G01; G01N; G01N31/00; G01N31/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |