US3424720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polybenzothiazoles
Assignee: Beazer East Inc
•
Filing: 1963-04-18
•
Granted: 1969-01-28
•
Expires: 1983-04-18
Abstract
No abstract record available.
Inventors
- 👤 Bernard Rudner
- 👤 Philip E Brumfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
8 words
A POLYMER HAVING 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) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |