US3527826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the disproportionation of toluene
Assignee: Toray Industries Inc
•
Filing: 1969-05-19
•
Granted: 1970-09-08
•
Expires: 1989-05-19
Abstract
No abstract record available.
Inventors
- 👤 Takeshi Sonoda
- 👤 Masaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:13
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/025; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18; B01J29/80; C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/18; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2973327A
Cited
US3158579A
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US3234147A
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US3323876A
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US3250728A
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US3239471A
Cited
US3281483A
Cited
US3326818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |