US3281394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolyzed phthalaldehyde
Assignee: Monsanto Co
•
Filing: 1963-02-25
•
Granted: 1966-10-25
•
Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 John E Katon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:55
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/52; C07C47/544; C07C45/00; C07C45/51
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
PYROLYZED PHTHLADEHYDE CHARACTERIZED BY A RESISTIVITY OF FROM 10**3 TO 10**10 OHM-CM. AT 40*C. AND 10**1 TO 10**8 OHM-CM. AT 320*C.
Claim 2
Dependent Claim
21 words
PYROLYZED PHTHLADEHYDE CHARACTERIZED BY A RESISTIVITY OF FROM 10**3 TO 10**10 OHM-CM. AT 40*C. AND 10**1 TO 10**8 OHM-CM. AT 320*C.
Claim 3
Dependent Claim
44 words
A PROCESS FOR PYROLYZING PHTHALADEHYDE WHICH COMPRISES HEATING THE PHTHALADEHYDE IN A CLOSED VESSEL AT A MINIMUM TEMPERATURE OF 300*C. FOR A TIME SUFFICIENT TO ACHIEVE SUBSTANTIAL REACTION, AND THEREBY PRODUCING A MATERIAL HAVING A RESISTIVITY OF NOT MORE THAN 10**10 OHM-CM AT 40*C.
Claim 4
Dependent Claim
44 words
A PROCESS FOR PYROLYZING PHTHALADEHYDE WHICH COMPRISES HEATING THE PHTHALADEHYDE IN A CLOSED VESSEL AT A MINIMUM TEMPERATURE OF 300*C. FOR A TIME SUFFICIENT TO ACHIEVE SUBSTANTIAL REACTION, AND THEREBY PRODUCING A MATERIAL HAVING A RESISTIVITY OF NOT MORE THAN 10**10 OHM-CM AT 40*C.
References Cited (Backward Citations)
US3124559A
Cited
US2349979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |