Patent US3546168A successfully refreshed from Google Patents.
US3546168A
Expired / Lapsed
US
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Polyesters of polyaryl diols
Assignee: 3M Co
•
Filing: 1969-09-11
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Granted: 1970-12-08
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Expires: 1989-09-11
Abstract
No abstract record available.
Inventors
- 👤 Michael George Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:05
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/193; C08G63/40; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3251805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |