US3043669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical testing means
Assignee: Individual
•
Filing: 1960-09-21
•
Granted: 1962-07-10
•
Expires: 1980-09-21
Abstract
No abstract record available.
Inventors
- 👤 Charles Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:11
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
CHEMICAL TESTING MEANS FOR DETECTING THE PRESENCE OF A GIVEN CONSTITUENT IN A FLUID COMPRISING A BASE AND A FIBROUS NAP ADHESIVELY BONDED TO SAID BASE, SAID NAP COMPRISING SHORT FIBROUS ELEMENTS INCLUDING A CHEMICAL REAGENT INDICATOR WHICH WILL CHANGE COLOR UPON CONTACT WITH FLUID CONTAINING SAID GIVEN CONSTITUENT.
Claim 2
Dependent Claim
49 words
CHEMICAL TESTING MEANS FOR DETECTING THE PRESENCE OF A GIVEN CONSTITUENT IN A FLUID COMPRISING A BASE AND A FIBROUS NAP ADHESIVELY BONDED TO SAID BASE, SAID NAP COMPRISING SHORT FIBROUS ELEMENTS INCLUDING A CHEMICAL REAGENT INDICATOR WHICH WILL CHANGE COLOR UPON CONTACT WITH FLUID CONTAINING SAID GIVEN CONSTITUENT.
References Cited (Backward Citations)
US2129754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |