Patent US2521720A successfully refreshed from Google Patents.
US2521720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifouling paints and compositions of matter
Assignee: Beazer East Inc
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Filing: 1945-12-13
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Granted: 1950-09-12
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Expires: 1965-12-13
Abstract
No abstract record available.
Inventors
- 👤 William H Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:59
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
AN ORGANO-METAL PERTHIOCYANATE HAVING A CARBON ATOM OF AN ORGANIC RADICAL LINKED TO THE PERTHIOCYANATE GROUP THROUGH A METAL.
Claim 2
Dependent Claim
19 words
AN ORGANO-METAL PERTHIOCYANATE HAVING A CARBON ATOM OF AN ORGANIC RADICAL LINKED TO THE PERTHIOCYANATE GROUP THROUGH A METAL.
References Cited (Backward Citations)
GB329987A
Cited
US2097339A
Cited
US2086419A
Cited
US2287218A
Cited
US2285410A
Cited
US2389229A
Cited
US2411815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |