Patent US2847443A successfully refreshed from Google Patents.
US2847443A
Expired / Lapsed
US
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Pentaerythritol products
Assignee: Shea Chemical Corp
•
Filing: 1956-05-02
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Granted: 1958-08-12
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Expires: 1976-05-02
Abstract
No abstract record available.
Inventors
- 👤 Hechenbleikner Ingenuin
- 👤 Francis C Lanoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2633; C10L1/2641; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/145; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526; C08K5/527
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
8 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
8 words
A PRODUCT SELECTED FROM THE GROUP CONSISTING OF
Claim 3
Dependent Claim
15 words
A PROCESS OF PREPARING A MIXED PHOSPHITE ESTER COMPRISING CONDENSING AN ESTER HAVING THE FORMULA
Claim 4
Dependent Claim
15 words
A PROCESS OF PREPARING A MIXED PHOSPHITE ESTER COMPRISING CONDENSING AN ESTER HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |