US3197942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removal of hydrogen halide from a process stream
Assignee: Texas Instruments Inc
•
Filing: 1964-04-07
•
Granted: 1965-08-03
•
Expires: 1984-04-07
Abstract
No abstract record available.
Inventors
- 👤 Robert W Haisty
- 👤 John W Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02; C01B33/021; C01B33/027; C01B33/03; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF EFFICIENTLY REMOVING HYDROGEN HALIDE FROM A PROCESS STREAM CONSISTING ESSENTIALLY OF HYDROGEN HALIDE AND A SUBSTANTIALLY UNADSORBABLE CARRIER GAS, WHICH COMPRISES THE STEPS OF MODIFYING A SYNTHETIC ZEOLITE SELECTED FROM THE GROUP CONSISTING OF TYPE 4A AND TYPE 5A MOLECULAR SIEVES BY ION EXCHANGE USING CALCIUM IONS, AND THEREAFTER PASSING THE PROCESS STREAM THROUGH THE MODIFIED SIEVE AT A TEMPERATURE FROM ABOUT 30*C. TO ABOUT 350*C.
Claim 2
Independent Claim
69 words
A METHOD OF EFFICIENTLY REMOVING HYDROGEN HALIDE FROM A PROCESS STREAM CONSISTING ESSENTIALLY OF HYDROGEN HALIDE AND A SUBSTANTIALLY UNADSORBABLE CARRIER GAS, WHICH COMPRISES THE STEPS OF MODIFYING A SYNTHETIC ZEOLITE SELECTED FROM THE GROUP CONSISTING OF TYPE 4A AND TYPE 5A MOLECULAR SIEVES BY ION EXCHANGE USING CALCIUM IONS, AND THEREAFTER PASSING THE PROCESS STREAM THROUGH THE MODIFIED SIEVE AT A TEMPERATURE FROM ABOUT 30*C. TO ABOUT 350*C.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |