US3297634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic dicarbonate
Assignee: Honeywell International Inc
•
Filing: 1963-02-04
•
Granted: 1967-01-10
•
Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Bryce C Oxenrider
- 👤 Ralph M Hetterly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:37
CPC Classifications
C; C07; C07D; C07D323/00; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/20; C08G64/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
4 words
CYCLO-BIS-4,4''-(A,A''-DIPHENYL-A,A,A'',A''-TETRAMETHYLXYLYLYL)DICARBONATE OF THE FORMULA:
Claim 2
Dependent Claim
4 words
CYCLO-BIS-4,4''-(A,A''-DIPHENYL-A,A,A'',A''-TETRAMETHYLXYLYLYL)DICARBONATE OF THE FORMULA:
Claim 3
Dependent Claim
17 words
A PROCESS FOR THE PREPARATION OF A PLOYCARBONATE RESIN CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA:
Claim 4
Dependent Claim
17 words
A PROCESS FOR THE PREPARATION OF A PLOYCARBONATE RESIN CONSISTING ESSENTIALLY OF RECURRING UNITS 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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |