US3131030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reagent carrier for gas detecting tubes
Assignee: Individual
•
Filing: 1961-01-19
•
Granted: 1964-04-28
•
Expires: 1981-01-19
Abstract
No abstract record available.
Inventors
- 👤 Karl F Grosskopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:48
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; Y; Y10; Y10T; Y10T436/00; Y10T436/15; Y10T436/17; Y10T436/173845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
AN INDICATOR FOR A DETECTING TUBE COMPRISING A GAS DETECTING REAGENT COATING ON A CARRIER COMPOSED OF NON-POROUS GRAINS OF A PLASTIC WHICH IS BRITTLE AT NORMAL TEMPERATURES RANGING FROM ABOUT MINUS 20 TO PLUS 20 DEGREES CENTIGRADE.
Claim 2
Dependent Claim
38 words
AN INDICATOR FOR A DETECTING TUBE COMPRISING A GAS DETECTING REAGENT COATING ON A CARRIER COMPOSED OF NON-POROUS GRAINS OF A PLASTIC WHICH IS BRITTLE AT NORMAL TEMPERATURES RANGING FROM ABOUT MINUS 20 TO PLUS 20 DEGREES CENTIGRADE.
References Cited (Backward Citations)
US2286636A
Cited
US2487077A
Cited
US2461089A
Cited
US2757632A
Cited
US2879005A
Cited
GB805853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |