US2532971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing optical coatings
Assignee: PACIFIC UNIVERSAL PRODUCTS COR
•
Filing: 1947-04-12
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Granted: 1950-12-05
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Expires: 1967-04-12
Abstract
No abstract record available.
Inventors
- 👤 Oscar Van Leer
- 👤 Jr Morris A Zook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:15
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/50; C23C14/505
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2260471A
Cited
US2351537A
Cited
US2398382A
Cited
US2414406A
Cited
US2408614A
Cited
US2383470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |