US3439725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draw-curtain mechanism
Assignee: LENSOL PRONOTIONAL SALES Inc
•
Filing: 1966-12-20
•
Granted: 1969-04-22
•
Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Leonard J Haimovitz
- 👤 Roy C Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:54
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/262; E06B2009/2622
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1321800A
Cited
US1326249A
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US1663819A
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US1289281A
Cited
US1407248A
Cited
US2247260A
Cited
US2386695A
Cited
US2410662A
Cited
US3160202A
Cited
US3322182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |