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US3186993A Expired / Lapsed US ⏱️ 0.0 years remaining

alpha, alpha'-(1, 4-piperazinediyl) bis (3, 5-dialkyl-4-hydroxythiobenzaldehyde) compounds

Assignee: Ethyl Corp
•
Filing: 1962-06-07
•
Granted: 1965-06-01
•
Expires: 1982-06-07
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Gordon G Knapp

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 10:12
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/194; C10; C10M; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/028; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/06; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2227/00; C10M2227/08; C10M2227/082; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/02; C10N2040/08; C10N2040/12; C10N2040/13; C10N2040/135; C10N2040/14; C10N2040/16; C10N2040/17; C10N2050/00; C10N2050/10

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 5 words
A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim 5 words
A COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim 16 words
THE PROCESS OF PRODUCING COMPOUNDS OF CLAIM 1 WHICH COMPRISES REACTING A PIPERAZINEDIYLBIS-P-CRESOL HAVING THE FORMULA:
Claim 4
Dependent Claim 17 words
THE PROCESS OF PRODUCING A COMPOUND OF CLAIM 1 WHICH COMPRISES REACTING A BENZALDEHYDE HAVING THE FORMULA:

References Cited (Backward Citations)

US2870152A Cited
US2800452A Cited
US2805998A Cited
US2927924A Cited
US2997474A Cited
US3000892A Cited
US3000891A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1968-05-31 1968-11-30 1969-06-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1972-05-31 1972-11-30 1973-06-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1976-05-31 1976-11-30 1977-06-01 $7700.00 Window Closed / Lapsed

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