Patent US3522044A successfully refreshed from Google Patents.
US3522044A
Expired / Lapsed
US
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Negative-working reproduction material
Assignee: Kalle GmbH and Co KG
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Filing: 1965-12-09
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Granted: 1970-07-28
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Expires: 1985-12-09
Abstract
No abstract record available.
Inventors
- 👤 Ernst-August Hackmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:31
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07D207/00; C07D207/02; C07D207/30; C07D207/32; C07D209/00; C07D209/02; C07D209/04; C07D209/08; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/26; C07D249/00; C07D249/02; C07D249/08
Claims Analysis
Total Claims: 0
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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) | 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 |