US3522080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hardening the surfaces of synthetic materials
Assignee: Bayer AG
•
Filing: 1968-07-18
•
Granted: 1970-07-28
•
Expires: 1988-07-18
Abstract
No abstract record available.
Inventors
- 👤 Karl Dietzel
- 👤 Gunter Peilstocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:41
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/10; C08; C08J; C08J7/00; C08J7/04; C08J7/046; C08J7/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2432538A
Cited
US2463791A
Cited
US2622041A
Cited
US2920002A
Cited
US2952559A
Cited
GB909503A
Cited
US3206323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |