US2987514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters
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
2026-10-24 00:27
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/14; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/173; 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
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
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US2267965A
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US2324491A
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US2369818A
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US2640029A
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US2713559A
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US2713582A
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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 |