US2987521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric partial esters of hydrocarbon-diimidazolinylalkanols and dicarboxylic acids
Assignee: Baker Petrolite LLC
•
Filing: 1958-03-03
•
Granted: 1961-06-06
•
Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 William B Hughes
- 👤 Verner L Stromberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:52
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/14; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/238; C10L1/2383; C10L1/2387; Y; Y10; Y10S; Y10S507/00; Y10S507/939; Y10S516/00; Y10S516/01; Y10S516/07; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A COMPOUND CONTAINING AT LEAST ONE FREE CARBOXYLIC ACID GROUP FORMED BY REACTING A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
18 words
A COMPOUND CONTAINING AT LEAST ONE FREE CARBOXYLIC ACID GROUP FORMED BY REACTING A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2211011A
Cited
US2267965A
Cited
US2324491A
Cited
US2369818A
Cited
US2468163A
Cited
US2574537A
Cited
US2468180A
Cited
US2845439A
Cited
US2640029A
Cited
US2773879A
Cited
US2695884A
Cited
US2713582A
Cited
US2713559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |