US3821071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety panes
Assignee: Bayer AG
•
Filing: 1971-12-13
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Granted: 1974-06-28
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Expires: 1991-12-13
Abstract
Abstract A polycarbonate sheet and a glass sheet slidably mounted one on the other in face to face relationship.
Inventors
- 👤 K Dietzel
- 👤 G Peilstocker
- 👤 K Meyer
- 👤 H Streib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:28
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/36; B32B27/365; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/10165; B32B17/1033; B32B17/10376; B32B2369/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24025; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31667
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |