US2988541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making anhydride polymers
Assignee: Goodrich Corp
•
Filing: 1955-12-27
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Granted: 1961-06-13
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Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Waldo L Semon
- 👤 John F Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:56
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/08; C07; C07C; C07C51/00; C07C51/54; C07C51/56; C08F22/00; C08F22/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A METHOD OF PREPARING POLYMERS HAVING A PLURALITY OF
Claim 2
Independent Claim
9 words
A METHOD OF PREPARING POLYMERS HAVING A PLURALITY OF
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |