US2535827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for depolymerizing polymers of 1, 1-dicyano ethylene
Assignee: Goodrich Corp
•
Filing: 1949-03-04
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Granted: 1950-12-26
•
Expires: 1969-03-04
Abstract
No abstract record available.
Inventors
- 👤 Alan E Ardis
- 👤 Gilbert Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:31
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A METHOD OF PREPARING MONOMERIC 1,1-DICYANO ETHYLENE WHICH COMPRISES HEATING THE CORRESPONDING POLYMER AT A TEMPERATURE IN EXCESS OF ITS DECOMPOSITION POINT WHEREUPON VAPORS ARE EVOLVED, AND CONDENSING SAID VAPORS.
Claim 2
Independent Claim
30 words
A METHOD OF PREPARING MONOMERIC 1,1-DICYANO ETHYLENE WHICH COMPRISES HEATING THE CORRESPONDING POLYMER AT A TEMPERATURE IN EXCESS OF ITS DECOMPOSITION POINT WHEREUPON VAPORS ARE EVOLVED, AND CONDENSING SAID VAPORS.
References Cited (Backward Citations)
US2467378A
Cited
US2476270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |