US2587442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of maleic anhydride with allyl esters of alkylidene-bis-aromatic carbonaties
Assignee: Goodrich Corp
•
Filing: 1947-02-14
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Granted: 1952-02-26
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Expires: 1967-02-14
Abstract
No abstract record available.
Inventors
- 👤 Earl J Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:06
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/04; C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
IN THE METHOD OF TRANSFORMING A LIQUID ESTER OF THE FORMULA
Claim 2
Dependent Claim
11 words
IN THE METHOD OF TRANSFORMING A LIQUID ESTER OF THE FORMULA
References Cited (Backward Citations)
US2384115A
Cited
US2373067A
Cited
US2340110A
Cited
US2370589A
Cited
US2479522A
Cited
US2455652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |