US2461480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing light filter foils
Assignee: GAF Chemicals Corp
•
Filing: 1945-05-11
•
Granted: 1949-02-08
•
Expires: 1965-05-11
Abstract
No abstract record available.
Inventors
- 👤 Verne H Reckmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:52
CPC Classifications
B; B29; B29D; B29D7/00; B29D7/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1981472A
Cited
US2057563A
Cited
US2184564A
Cited
US2173471A
Cited
US2332559A
Cited
US2320431A
Cited
US2306222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |