Patent US2834738A successfully refreshed from Google Patents.
US2834738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of skeletal glass catalysts
Assignee: Imperial Chemical Industries Ltd
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Filing: 1955-08-08
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Granted: 1958-05-13
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Expires: 1975-08-08
Abstract
No abstract record available.
Inventors
- 👤 Vincent George Clarkson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:00
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J37/08; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/076; C03C3/089; C03C3/091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS FOR THE PRODUCTION OF A SKELETAL GLASS CATALYST IN THE FORM OF A SINTERED AGGREGATE WHICH COMPRISES THE STEPS OF SUBJECTING A GLASS HAVING THE COMPOSITION:
Claim 2
Dependent Claim
28 words
A PROCESS FOR THE PRODUCTION OF A SKELETAL GLASS CATALYST IN THE FORM OF A SINTERED AGGREGATE WHICH COMPRISES THE STEPS OF SUBJECTING A GLASS HAVING THE COMPOSITION:
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |