US3515684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidizable catalyst particle formation
Assignee: Air Products and Chemicals Inc
•
Filing: 1969-02-17
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Granted: 1970-06-02
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Expires: 1989-02-17
Abstract
No abstract record available.
Inventors
- 👤 James E Mcevoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:18
CPC Classifications
B; B01; B01J; B01J37/00; B01J16/00; B01J19/00; B01J19/18; B01J19/1806; B01J37/0009; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00099; B01J2219/00103; B01J2219/00159
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2944986A
Cited
US3323876A
Cited
US3301794A
Cited
US3310373A
Cited
US3337474A
Cited
US3324048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |