Patent DE490168C successfully refreshed from Google Patents.
Patent US2878235A successfully refreshed from Google Patents.
US2878235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide of meta-xylylene diamine and 8 to 10 carbon atom aliphatic dicarboxylic acids
Assignee: California Research LLC
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Filing: 1956-10-08
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Granted: 1959-03-17
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Juanita S Butler
- 👤 Funston G Lum
- 👤 Earl F Carlston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:50
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A CRYSTALLINE POLYMIDE OF META-XYLYLENE DIAMINE AND AN ALIPHATIC DICARBOXYLIC ACID CONTAINING FROM 8 TO 10 CARBON ATOMS.
Claim 2
Dependent Claim
18 words
A CRYSTALLINE POLYMIDE OF META-XYLYLENE DIAMINE AND AN ALIPHATIC DICARBOXYLIC ACID CONTAINING FROM 8 TO 10 CARBON ATOMS.
References Cited (Backward Citations)
US2766221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |