US3076789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides from diamines having two deuterium atoms on both chain carbons alpha to the two amino nitrogens
Assignee: EIDP Inc
•
Filing: 1957-07-23
•
Granted: 1963-02-05
•
Expires: 1977-07-23
Abstract
No abstract record available.
Inventors
- 👤 Walter E Mochel
- 👤 William H Sharkey
- 👤 Frederick T Wall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:02
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A FILM AND FIBER-FORMING POLYAMIDE EXHIBITING OUTSTANDING LIGH DURABILITY AND CONSISTING ESSENTIALLY OF THE CONDENSATION PRODUCT OF A DIBASIC CARBOXYLIC ACID AND A DIPRIMARY A,A,A'',A''-TETRADEUTERODIAMINE OF THE FORMULA
Claim 2
Dependent Claim
28 words
A FILM AND FIBER-FORMING POLYAMIDE EXHIBITING OUTSTANDING LIGH DURABILITY AND CONSISTING ESSENTIALLY OF THE CONDENSATION PRODUCT OF A DIBASIC CARBOXYLIC ACID AND A DIPRIMARY A,A,A'',A''-TETRADEUTERODIAMINE OF 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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |