US2667522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen derivatives of tetraacetic acids as rubber stabilizers
Assignee: Permacel Tape Corp
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Filing: 1949-07-07
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Granted: 1954-01-26
•
Expires: 1969-07-07
Abstract
No abstract record available.
Inventors
- 👤 John F Mcelroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/175
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
A COMPOSITION COMPRISING RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND THE COPOLYMERS OF BUTADIENE AND ACRLONITRILE AND BUTADIENE AND STYRENE IN ITS SOFT AND SOLUBLE, SUBSTANTIALLY UNVULCANIZED STATE AND FROM ABOUT 0.05 TO ABOUT TEN PER CENT BY WEIGHT OF THE COMPOSITION OF AT LEAST ONE COMPOUND OF THE FORMULA
References Cited (Backward Citations)
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Cited
US2560744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |