US3501884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall construction glazing system
Assignee: National Gypsum Co
•
Filing: 1967-10-16
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Granted: 1970-03-24
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Expires: 1987-10-16
Abstract
No abstract record available.
Inventors
- 👤 John J Di Cesare Jr
- 👤 Edward J Rutkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:17
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/04; E06B1/12; E04; E04B; E04B2/00; E04B2/88; E04B2/96; E06B3/00; E06B3/54; E06B3/58; E06B3/5807; E06B3/5821
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA643541A
Cited
FR1228973A
Cited
US3016993A
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US3147518A
Cited
US3081849A
Cited
US3090085A
Cited
US3267629A
Cited
US3334463A
Cited
US3352078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |