US1203802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for etching plates in the photo-engraving process.
Assignee: PAUL M HAMMALIAN
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Filing: 1912-08-21
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Granted: 1916-11-07
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Expires: 1932-08-21
Abstract
No abstract record available.
Inventors
- 👤 John J C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:06
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0402; H10P72/0406; H10P72/0411; H10P72/0414
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) | 1919-11-07 | 1920-05-08 | 1920-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-11-07 | 1924-05-08 | 1924-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-11-07 | 1928-05-08 | 1928-11-07 | $7700.00 | Window Closed / Lapsed |